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Zhang J, Sun S, Bai X, Yang N, Liu Y, Wu X, Li X. Metabolomics analysis of the effect of GnRH on the pregnancy rate of ewes with estrus synchronization scheme based on progesterone. Front Vet Sci 2024; 11:1442931. [PMID: 39055862 PMCID: PMC11270128 DOI: 10.3389/fvets.2024.1442931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 06/24/2024] [Indexed: 07/28/2024] Open
Abstract
Introduction Gonadotropin-releasing hormone (GnRH) is widely used in the timed artificial insemination protocol for sheep. However, there remains a debate regarding its impact on pregnancy rates during artificial insemination. This study aims to evaluate the effect of GnRH on the pregnancy rates in Huyang ewes, analyze the pre-implantation metabolite changes caused by GnRH using metabolomics, and elucidate the mechanism effect on pregnancy rates. Methods All ewes were administered a vaginal progesterone sponge containing 45 mg of flurogestone acetate for 12 days and received 330 units of equine chorionic gonadotropin (eCG) intramuscularly after sponge removal. The experimental group (n = 69) received an intramuscular treatment of 17 μg GnRH agonist triptorelin 48 h after sponge removal on Day 0, while the control group (n = 41) received 1 mL of sterile saline solution. All ewes underwent a single vaginal insemination 58 h after the withdrawal of the progesterone sponge. The difference in pregnancy rates between the two groups was calculated. Metabolomic analysis was performed on plasma samples collected on Day 7 after the treatment of GnRH agonist. Results Gonadotropin-releasing hormone (GnRH) treatment significantly reduced the pregnancy rate in the experimental group compared with the control group (72.2 vs. 82.9%, p < 0.05). Metabolomic analysis indicated that GnRH treatment affected metabolites involved in collagen synthesis and prostaglandin synthesis in the endometrial tissue, which includes a marked decrease in hydroxyproline amino acid content and a significant increase in corticosterone and prostaglandin D2 lipids and unsaturated fatty acids. Conclusion In summary, the injection of GnRH agonist Triptorelin 48 h after progesterone sponges removal reduces the pregnancy rate of Huyang ewe following artificial insemination. It also affects the metabolite levels related to endometrial collagen and prostaglandin synthesis, harming embryo implantation.
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Affiliation(s)
- Jing Zhang
- College of Animal Science and Technology, Hebei Technology Innovation Center of Cattle and Sheep Embryos, Hebei Agricultural University, Baoding, Hebei, China
| | - Shuyuan Sun
- College of Animal Science and Technology, Hebei Technology Innovation Center of Cattle and Sheep Embryos, Hebei Agricultural University, Baoding, Hebei, China
| | - Xinyu Bai
- College of Animal Science, Tarim University, Alear, Xinjiang, China
| | - Nana Yang
- College of Animal Science and Technology, Hebei Technology Innovation Center of Cattle and Sheep Embryos, Hebei Agricultural University, Baoding, Hebei, China
| | - Yiyong Liu
- Institute of Xinjiang Yili Animal Science, Yining, Xinjiang, China
| | - Xinglong Wu
- College of Animal Science and Technology, Hebei Technology Innovation Center of Cattle and Sheep Embryos, Hebei Agricultural University, Baoding, Hebei, China
| | - Xiangyun Li
- College of Animal Science and Technology, Hebei Technology Innovation Center of Cattle and Sheep Embryos, Hebei Agricultural University, Baoding, Hebei, China
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Hai E, Li B, Zhang J, Zhang J. Sperm freezing damage: the role of regulated cell death. Cell Death Discov 2024; 10:239. [PMID: 38762505 PMCID: PMC11102515 DOI: 10.1038/s41420-024-02013-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/04/2024] [Accepted: 05/07/2024] [Indexed: 05/20/2024] Open
Abstract
Substantial progress in research on sperm cryopreservation has occurred since the twentieth century, especially focusing on improving sperm freezing procedures and optimizing semen extenders. However, the cellular biological mechanisms of sperm freezing damage are still unclear, which greatly restricts the promotion and development of sperm cryopreservation. An essential component of sperm freezing damage is the occurrence of cell death. Considering the existence of multiple types of cell death pathways, this review discusses connections between characteristics of regulated cell death (e.g., apoptosis and ferroptosis), and accidental cell death (e.g., intracellular ice crystals) with sperm freezing damage and explores possible future research directions in this field.
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Affiliation(s)
- Erhan Hai
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Boyuan Li
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Jian Zhang
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Jiaxin Zhang
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China.
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Burutaran M, Fierro S, Negrín F, Minteguiaga M, Gil J, Olivera-Muzante J. Estrous, ovulation and reproductive responses of ewes synchronized with a long interval prostaglandin-based protocol for timed AI. Theriogenology 2024; 214:187-191. [PMID: 37897847 DOI: 10.1016/j.theriogenology.2023.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 10/22/2023] [Accepted: 10/22/2023] [Indexed: 10/30/2023]
Abstract
The aim was to characterize and assess the reproductive performance of a long interval prostaglandin (PG)-based protocol for timed AI (TAI) at different times. During breeding season three experiments were done involving 622 Merino ewes, 11 rams, and five androgenized wethers per 100 ewes. All ewes were estrus synchronized with two PG injections 15-day apart (PG15): Day -15 and 0 (Hour 0). Estrous distribution respect to Hour 0, estrous response and synchrony after Hour 0, and interval from Hour 0 to estrus detection (PG-estrus) was evaluated (Experiment I; n = 105 ewes). Interval from estrus detection to ovulation (estrus-ovulation) and from Hour 0 to ovulation (PG-ovulation) was determined (Experiment II; n = 12 ewes). Visual-physical score of cervical mucus at TAI, non-return to service to Day 23 (NRR23), fertility, prolificacy, and fecundity to Day 60 in four cervical fresh semen TAI groups was evaluated (Experiment III; n = 505 ewes; 107 nulliparous-398 multiparous). Three groups with single service at 56 (Control), 44 or 68, and one with double service at 44 and 68 ± 1.5 h after Hour 0 (PG15-56, PG15-44, PG15-68, and PG15-44/68 groups, respectively) were tested. Ninety-eight-point one percent of the ewes showed estrus from Hour -48 up to 84 respects to Hour 0. Twenty percent of them showed estrus from Hour -48 up to 0, and 78.1 % from Hour 12 up to 84 (Experiment I). The largest proportion of ewes in estrus was observed between Hour 36 and 60 (80.5 %). PG-estrus interval was 54.1 ± 10 h (means ± SD). Estrus-ovulation interval was 32.4 ± 5.8 h, and PG-ovulation interval was 77.0 ± 16.6 h (Experiment II). Ewe parity did not affect any of the reproductive variables (P > 0.05; Experiment III). There were no significant differences (P > 0.05) between Control and different groups in mucus score (2.18 ± 0.08, 2.02 ± 0.07, 2.14 ± 0.09, 2.25 ± 0.10), NRR23 (76.0, 71.9, 78.6, 79.4 %) or fertility (66.4, 64.1, 66.7, 73.8 %; PG15-56, PG15-44, PG15-68 or PG15-44/68 groups, respectively). Prolificacy in PG15-44 group was lower (1.07 ± 0.03; P < 0.05) than other groups (1.27 ± 0.05, 1.23 ± 0.05, 1.20 ± 0.04), and fecundity than PG15-44/68 group (0.84, 0.69, 0.82, 0.89), without differences among other groups (PG15-56, PG15-44, PG15-68 or PG15-44/68 groups, respectively). We concluded that any time between 56 and 68 h after PG15 protocol could be used to perform cervical TAI using fresh semen, without benefits of a double TAI service at 44 and 68 h.
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Affiliation(s)
- M Burutaran
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Unidad de Sistemas Pecuarios y Gestión, Dpto. de Ciencias Veterinarias y Agrarias, CENUR Litoral Norte, Facultad de Veterinaria, Universidad de la República, Estación Experimental M. A. Cassinoni, Ruta 3 km 363, PO Box 60000, Paysandú, Uruguay
| | - S Fierro
- Secretariado Uruguayo de la Lana (SUL), Área de Transferencia de Tecnología, Servando Gómez 2408, PO Box 12100, Montevideo, Uruguay
| | - F Negrín
- Unidad de Ovinos, Lanas y Caprinos, Dpto. de Producción Animal y Salud en los Sistemas Productivos, Facultad de Veterinaria, Universidad de la República, Ruta 1 km 42.5, San José, Uruguay
| | - M Minteguiaga
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Unidad de Sistemas Pecuarios y Gestión, Dpto. de Ciencias Veterinarias y Agrarias, CENUR Litoral Norte, Facultad de Veterinaria, Universidad de la República, Estación Experimental M. A. Cassinoni, Ruta 3 km 363, PO Box 60000, Paysandú, Uruguay
| | - J Gil
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Unidad de Sistemas Pecuarios y Gestión, Dpto. de Ciencias Veterinarias y Agrarias, CENUR Litoral Norte, Facultad de Veterinaria, Universidad de la República, Estación Experimental M. A. Cassinoni, Ruta 3 km 363, PO Box 60000, Paysandú, Uruguay
| | - J Olivera-Muzante
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Unidad de Sistemas Pecuarios y Gestión, Dpto. de Ciencias Veterinarias y Agrarias, CENUR Litoral Norte, Facultad de Veterinaria, Universidad de la República, Estación Experimental M. A. Cassinoni, Ruta 3 km 363, PO Box 60000, Paysandú, Uruguay.
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Weaver AC, Kelly JM, Swinbourne AM, Kleemann DO, Walker SK. Strategies to improve the success of fixed-time artificial insemination in the ewe. Reprod Domest Anim 2023; 58:1359-1367. [PMID: 37573132 DOI: 10.1111/rda.14450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/22/2023] [Accepted: 08/01/2023] [Indexed: 08/14/2023]
Abstract
During the sheep breeding season, ovulatory follicles vary widely in age at pessary removal impacting both the timing of oestrus and pregnancy rates following artificial insemination (AI). Ovulatory follicles that emerge between days 7 to 9 of the pessary period are associated with higher fertility whilst those that emerge earlier or later are associated with lower fertility. In this study, two strategies to improve the success of AI by controlling the development of the ovulatory follicle were examined. In the first, ewes were treated with PGF2α at either -12 and/or +6 days (experiment 1) or -27 days (experiment 2) relative to pessary insertion to control the time of emergence of the ovulatory follicle. In the second, ewes were treated with eCG (400 IU per ewe) at either 0 h, -6 h or -12 h relative to pessary removal (experiment 3) to improve the development of young ovulatory follicles. PGF2α administered on day -27 increased the percentage of pregnant ewes by 17.8% and the number of foetuses per 100 ewes inseminated by 33.9%. PGF2α treatment at other times had either no effect or reduced fertility. During the breeding season, treatment with eCG at -12 h improved the synchrony of oestrus, reduced the size of the ovulatory follicle but did not improve pregnancy rate compared with other treatments. Treatment had no effect during the non-breeding season, supporting earlier findings that the quality of young ovulatory follicles differs during the year. In conclusion, PGF2α treatment 27 days before pessary insertion provides a new and cheap strategy to improve the success of fixed-time AI programs.
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Affiliation(s)
- Alice C Weaver
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, Australia
| | - Jennifer M Kelly
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, Australia
| | - Alyce M Swinbourne
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, Australia
| | - David O Kleemann
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, Australia
| | - Simon K Walker
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, Australia
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Dos Santos-Neto PC, Cuadro F, Souza-Neves M, Crispo M, Menchaca A. Refinements in embryo manipulation applied to CRISPR technology in livestock. Theriogenology 2023; 208:142-148. [PMID: 37329588 DOI: 10.1016/j.theriogenology.2023.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/29/2023] [Accepted: 05/29/2023] [Indexed: 06/19/2023]
Abstract
The implementation of CRISPR technology in large animals requires further improvements in embryo manipulation and transfer to be applied with commercial purposes. In this study we report (a) developmental competence of CRISPR/Cas microinjected zygotes subjected to in vitro culture in large scale programs in sheep; (b) pregnancy outcomes after early-stage (2-8-cell) embryo transfer into the oviduct or the uterine horn; and (c) embryo survival and birth rate after vitrification/warming of CRISPR/Cas microinjected zygotes. Experiment 1 consisted of a retrospective analysis to evaluate embryo developmental rate of in vitro produced zygotes subjected to CRISPR/Cas microinjection (n = 7,819) compared with a subset of non-microinjected zygotes (n = 701). Development rates to blastocyst on Day 6 were 20.0% for microinjected zygotes and 44.9% for non-injected zygotes (P < 0.05). In Experiment 2, CRISPR/Cas microinjected zygotes were transferred on Day 2 after in vitro fertilization (2-8 cell embryos) into the oviductal ampulla (n = 262) or into the uterine horn (n = 276) in synchronized recipient ewes at prefixed time (i.e., approximately two days after ovulation). Pregnant/transferred recipients (24.0% vs. 25.0%), embryo survival/transferred embryos (6.9% vs. 6.2%), and born lambs/pregnant embryos (72.2% vs. 100.0%) did not differ significantly in the two groups. In Experiment 3, CRISPR/Cas microinjected zygotes were maintained under in vitro culture until blastocyst stage (Day 6), and subjected to vitrification/warming via the Cryotop method (n = 474), while a subset of embryos were left fresh as control group (n = 75). Embryos were transferred into the uterine horn of recipient females at prefixed time 8.5 days after the estrous synchronization treatment (i.e., approximately six days after ovulation). Pregnancy rate (30.8% vs. 48.0%), embryo survival rate (14.8% vs. 21.3%), and birth rate (85.7% vs. 75.0%) were not different (PNS) between vitrified and fresh embryos, respectively. In conclusion, the current study in sheep embryos reports (a) suitable developmental rate after CRISPR/Cas microinjection (i.e., 20%), even though it was lower than non-microinjected zygotes; (b) similar outcomes when Day 2-embryos were placed into the uterine horn instead of the oviduct, avoiding both time-consuming and invasive oviduct manipulation, and extended in vitro culture during one week; (c) promising pregnancy and birth rates obtained with vitrification of CRISPR/Cas microinjected embryos. This knowledge on in vitro embryo development, timing of embryo transfer, and cryopreservation of CRISPR/Cas microinjected zygotes have practical implications for the implementation of genome editing technology in large animals.
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Affiliation(s)
- P C Dos Santos-Neto
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay
| | - F Cuadro
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay
| | - M Souza-Neves
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay; Unidad de Biotecnología en Animales de Laboratorio, Institut Pasteur de Montevideo, Uruguay
| | - M Crispo
- Unidad de Biotecnología en Animales de Laboratorio, Institut Pasteur de Montevideo, Uruguay
| | - A Menchaca
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay; Plataforma de Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), Montevideo, Uruguay.
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Sotgiu FD, Spezzigu A, Porcu C, Atzori AS, Sechi GS, Pasciu V, Molle G, Berlinguer F. Application of the "echo-synch protocol" to advance pregnancy onset in ewe lambs at the first reproductive season. Front Vet Sci 2023; 10:1180857. [PMID: 37252403 PMCID: PMC10213364 DOI: 10.3389/fvets.2023.1180857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/27/2023] [Indexed: 05/31/2023] Open
Abstract
Introduction This study assessed the efficacy and economic impact of a reproductive protocol based on repeated ultrasound scanning (US) associated with the use of GnRH to advance pregnancy onset in ewe lambs. Methods Prepubertal ewe lambs (n = 133) were divided into three weight groups (High: HW n = 35; Medium: MW n = 65; Low: LW n = 33). Thereafter, animals were randomly allocated into two subgroups: GnRH, ewe lambs treated with GnRH analog and then exposed to rams; CTR, ewe lambs exposed to rams only. CTR groups were joined with rams as a single flock. GnRH groups were kept separate from rams receiving a single dose of gonadorelin (40 μg/head) and then were evaluated after a week of US. Animals showing corpora lutea received an injection of PGF2α analog (100 μg/head) and then were joined with rams. The remaining ewe lambs received a second dose of gonadorelin and were kept separate from the rams. After another week, animals were checked again and the ones showing corpora lutea were injected with the PGF2α analog, while the others received a third injection of gonadorelin. On the same day, all the animals were joined with rams. Pregnancies were confirmed within 30 days by US. The efficacy of the protocol was determined by assessing differences in the number of days required to achieve pregnancy rates of 25, 50, and 75% and in the total costs and incomes from birth to the end of first lactation within the groups. Results The GnRH-MW group showed the best performances in reaching the threshold pregnancy rates of 25, 50, and 75%, but the effect of treatment was significant only at the 25% threshold (p < 0.01). Both low groups displayed an overall poorer performance at 50 and 75% thresholds than medium and high-weight groups (p = 0.01 and p < 0.01, respectively). The GnRH administration did not advance pregnancy onset in GnRH-HW compared with CTR-HW. In the balance between costs and income, the HW-CTR and MW-GnRH groups showed higher gross margins than the other groups. Conclusion Using the US/GnRH protocol in ewe lambs appears technically and economically effective in animals that have not reached the optimal weight at the first breeding season, advancing ewe lambs' pregnncies and increasing farm profitability.
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Affiliation(s)
| | - Antonio Spezzigu
- Embryo Sardegna, Technology, Reproduction and Fertility, Sassari, Italy
| | - Cristian Porcu
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | | | - Gian Simone Sechi
- Department of Agricultural Sciences, University of Sassari, Sassari, Italy
| | - Valeria Pasciu
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
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Ovarian follicle dynamics in ewes treated with intra-vaginal progesterone pessaries. 2. Factors affecting timing of estrus and reproductive outcomes following artificial insemination. Theriogenology 2023; 202:103-109. [PMID: 36933284 DOI: 10.1016/j.theriogenology.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 02/09/2023] [Accepted: 03/09/2023] [Indexed: 03/13/2023]
Abstract
This study extends observations on the effects of intra-vaginal progesterone treatment on the relationships between the time of luteolysis, emergence of the ovulatory follicle, timing of estrus and ewe fertility. Observations were made in progesterone - treated ewes in autumn, the spring equinox and late spring (Experiment 1, Data set 1) and in progesterone - treated ewes and naturally cycling ewes in autumn and the spring equinox (Experiment 1, Data set 2). In Data set 1, the day of emergence of both the first and second ovulatory follicle was positively related to the day luteal regression within each season. In turn, the day of emergence influenced the timing of estrus by means of a season by day of luteal regression interaction (P < 0.001) indicating that the relationship was positive in autumn and the spring equinox but negative in late spring. In autumn, older ovulatory follicles were associated with an earlier onset of estrus compared with younger ovulatory follicles. In late spring, this relationship was reversed and was influenced by whether or not ewes were cycling at the time of pessary insertion. In Data set 2, the relationship between the day of follicle emergence and luteal regression was influenced by a treatment by day of regression interaction indicating the relationship was positive in treated ewes and negative in naturally cycling ewes. Timing of estrus was positively related (P < 0.001) to both the day of luteal regression and the day of follicle emergence (P < 0.05), with both relationships being stronger in naturally cycling ewes than in treated ewes. In Experiment 2, pregnancy rate following artificial insemination in autumn was highest (90.2%) when luteolysis occurred during Days 7-9 of the pessary period compared with Days 1-6 (77.8%, P = 0.16), 10 to 12 (68.8%, P < 0.05) or Days ≥13 (71.2%, P < 0.05). Timing of estrus was not affected. The mean diameter of ovulatory follicles that emerged during Days 7-9 was larger on Day 12 (5.8 ± 0.13 mm) compared with other periods (range 4.7 ± 0.05 to 5.6 ± 0.14 mm). This study provides two potential strategies to improve the success of AI programs. Firstly, appropriately timed treatment with PGF2α to control the time of emergence of ovulatory follicles and, secondly, earlier treatment with eCG to improve the development of ovulatory follicles that emerge late in the pessary period. Each is likely to be influenced by season and the cyclical status of the ewe.
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Kandemir Ç. Effect of oxytocin added into sperm on artificial insemination in sheep. Arch Anim Breed 2023. [DOI: 10.5194/aab-66-61-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
Abstract. The use of additional oxytocin hormones in reproductive methods began in the
1970s in Europe. In recent studies, attempts have been made to achieve more
successful pregnancies by adding oxytocin to semen rather than administering
oxytocin exogenously to females. In light of this information, this study
aimed to understand the effects of adding low-dose oxytocin hormone into ram
semen on the pregnancy rate and reproductive efficiency of sheep. Semen was
collected from five Chios rams. The ejaculates were pooled and
Ovixcell® was used as the diluent. The estrus was synchronized
using an intravaginal sponge (Chrono-Gest®) from 122 Chios
ewes. After the sponge was left in the vagina for 12 d, a 500 IU PMSG
injection was made. In every sheep, intramuscular (IM) injections were inseminated by
the intracervical method using an insemination gun 50 h after injection.
Pregnancy results were obtained by ultrasound examination without practice.
Lambing performance was recorded at delivery; 53 out of 122 Chios ewes were
inseminated with oxytocin hormone content, and successful pregnancy was
achieved in 90.56 % of them. In the insemination of the remaining 69
sheep, oxytocin was not added, and the rate of successful pregnancy was
76.81 % (p=0.046). The overall success rate based on the insemination
results of all the sheep was determined to be 82.77 %. In an examination
of the pregnancy rate, one of the indicators of reproductive performance,
the difference between the groups is statistically significant (p≤0.05). Higher pregnancies were obtained in insemination with semen fluid
containing oxytocin.
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Walker SK, Kelly JM, Swinbourne AMS, Weaver AC, Kleemann DO. Ovarian follicle dynamics in ewes treated with intra-vaginal progesterone pessaries. 1. Follicle waves and parameters of the estrous cycle. Theriogenology 2023; 197:31-36. [PMID: 36463668 DOI: 10.1016/j.theriogenology.2022.11.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/17/2022] [Accepted: 11/24/2022] [Indexed: 11/27/2022]
Abstract
Progesterone treatment for synchrony of estrus is standard in sheep artificial insemination (AI) programs but can be associated with poor outcomes. Potential for improvement exists through a better understanding of the interactions between follicle development, luteal regression, emergence of the ovulatory follicle and timing of estrus. These interactions were examined by comparing progesterone-treated (Day 1 = day of pessary insertion) and naturally cycling ewes (Day 1 = day after estrus) at three times of the year (Autumn, Spring equinox and late Spring). Observations were made from Day 1 until the day of ovulation. Compared with the natural cycle, progesterone treatment (300 mg intra-vaginal pessary for 14 d) reduced the number of follicle waves (2.2 ± 0.18 versus 2.8 ± 0.12; P < 0.05) and increased the length of the ovulatory wave (8.6 ± 0.45 versus 6.6 ± 0.42 d; P < 0.05). The number of follicles per wave, the inter-wave interval and ovulation rate were not affected. However, progesterone treatment induced (P < 0.05) an earlier luteolysis (9.7 ± 0.51 versus 15.4 ± 0.49 d after Day 1), an earlier emergence of the ovulatory follicle (7.5 ± 0.48 versus 11.4 ± 0.46 d after Day 1) and an earlier onset of estrus (26.1 ± 2.95 versus 53.3 ± 2.84 h after Day 14). Time of year also influenced the response to progesterone treatment. In Autumn compared with the Spring equinox and late Spring, there was a reduction (P < 0.05) in follicle wave number (2.4 ± 0.21 versus 2.5 ± 0.29 versus 3.0 ± 0.20 respectively), follicles per wave (2.6 ± 0.27 versus 3.5 ± 0.25 versus 3.2 ± 0.20 respectively), ovulation rate (1.6 ± 0.12 versus 1.9 ± 0.12 versus 2.0 ± 0.10 respectively) and the inter-wave interval was longer (5.3 ± 0.40 versus 4.0 ± 0.32 versus 3.8 ± 0.27 d respectively; P < 0.05). Time of year also influenced (P < 0.05) the time of luteolysis (earliest in late Spring), emergence of the ovulatory follicle (earliest in Autumn) and onset of estrus (earliest in Autumn). It is concluded that (1) the effects of progesterone treatment on follicle waves are relatively minor, (2) the effects of treatment on timing of luteolysis, emergence of the ovulatory follicle and onset of estrus are all significant although the effects on AI outcomes remain to be determined and (3) time of year has a minimal effect on follicle waves but a more significant effect on other parameters of the estrous cycle. A better understanding of these complexities will assist in the development of improved protocols for synchrony of estrus.
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Affiliation(s)
- Simon K Walker
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, 5350, Australia.
| | - Jennifer M Kelly
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, 5350, Australia.
| | - Alyce M S Swinbourne
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, 5350, Australia.
| | - Alice C Weaver
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, 5350, Australia.
| | - David O Kleemann
- Turretfield Research Centre, South Australian Research and Development Institute, Rosedale, South Australia, 5350, Australia.
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Cosentino IO, Balaro MFA, Menchaca A, Perez-Clariget R, Ungerfeld R, Brandão FZ. Recent advances in treatments for resynchronization of ovulation in small ruminants: a review. Anim Reprod 2023; 20:e20220111. [PMID: 37101425 PMCID: PMC10124157 DOI: 10.1590/1984-3143-ar-2022-011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/17/2023] [Indexed: 04/28/2023] Open
Abstract
Hormonal methodologies to control small ruminants' estrous cycle are worldwide used and evolved, adjusting the application to the precise female physiological moments to enhance reproductive performance. The estrous cycle can be induced and/or synchronized, aiming for fixed-time artificial insemination, or based on estrus behavior signs for insemination, natural or guided mating. Successive protocols can be performed to resynchronize ovulation and increase reproductive outcomes in females that failed to conceive. These recently developed treatments aim to resynchronize the ovulation as earlier as non-pregnancy is detected. The present review aimed to summarize the recent advances and main findings regarding resynchronization protocols used in small ruminants. Lastly, we present future perspectives and new paths to be studied in the subject. The resynchronization treatment is still a growing field in small ruminant reproduction, nevertheless, some enhancements are found in the reproductive outcome, showing that such protocols can be successfully used in sheep and goat production.
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Affiliation(s)
| | | | - Alejo Menchaca
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria, Montevideo, Uruguay
| | - Raquel Perez-Clariget
- Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay
| | - Rodolfo Ungerfeld
- Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de la República, Montevideo, Uruguay
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11
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Zhang J, Wu X, Li X. GnRH administration after estrus induction protocol decreases the pregnancy rate of recipient ewes following transfer of frozen-thawed embryos. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Injectable progesterone for estrus and ovulation induction in seasonal anestrous ewes. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Faria LR, Junqueira FB, Campos JPA, Bazana MJF, Saczk AA, de Souza JC, de Lima RR, Alves NG. Metabolic Profiles and Follicular Dynamics of Prepubertal and Pubertal Santa Inês Ewe Lambs With Dietary Restriction and Supplementation With Roasted Whole Soybeans. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Lv C, Liang J, Yang H, Ni X, Raza SHA, Shah MA, Wu G, Quan G. The Proteomic Modification of Buck Ejaculated Sperm Induced by the Cryopreservation Process. Biopreserv Biobank 2022. [PMID: 35793518 DOI: 10.1089/bio.2022.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Using two-dimensional electrophoresis along with mass spectroscopy, we have investigated how the cryopreservation process affected the protein profile of goat ejaculated sperm. In this study, five bucks were used for semen collection. After removal of seminal plasma, the Tris-based extender containing glycerol and egg yolk was used to freeze semen. The results indicated that the post-thaw sperm quality showed a significant reduction compared with fresh sperm. The numbers of protein spots acquired in fresh and post-thaw sperm were 2926 ± 57 and 3061 ± 81, respectively. Twenty-two different abundant proteins (DAPs) were identified between fresh sperm and frozen-thawed sperm (≥3.0-folds, p < 0.05). The abundances of 19 proteins were significantly higher in the fresh sperm than the post-thaw sperm. The results of the gene ontology annotation showed the primary location of the DAPs on sperm cytoskeleton, protein complex, cytoplasm, and mitochondria. In addition, these proteins were mainly involved in ion binding, small molecular metabolic processes, structure molecule activity, guanosine triphosphatase activity, oxidoreductase activity, and protein complex assembly. The interaction networks among these DAPs demonstrated that they may play roles in oxidoreductase activity, structure, acrosomal function, and motility of sperm. Collectively, the proteome of goat sperm was altered during the cryopreservation process, demonstrating that protein modification induced by cryopreservation may be associated with the reduced quality of goat sperm after thawing.
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Affiliation(s)
- Chunrong Lv
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
| | - Jiachong Liang
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
| | - Hongyuan Yang
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China
| | - Xiaojun Ni
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China
| | | | - Mujahid Ali Shah
- Faculty of Fisheries and Protection of Water, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Guoquan Wu
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
| | - Guobo Quan
- Small Ruminant Department, Yunnan Animal Science and Veterinary Institute, Kunming City, Yunnan Province, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
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15
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Abril-Parreño L, Meade KG, Krogenæs AK, Druart X, Cormican P, Fair S. Ewe breed differences in the cervical transcriptome at the follicular phase of a synchronised oestrous cycle. BMC Genomics 2022; 23:363. [PMID: 35546662 PMCID: PMC9097332 DOI: 10.1186/s12864-022-08603-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/26/2022] [Indexed: 12/13/2022] Open
Abstract
Background Cervical artificial insemination (AI) with frozen-thawed semen results in unacceptably low pregnancy rates internationally. The exception is in Norway, where vaginal deposition of frozen-thawed semen to a natural oestrous routinely yields pregnancy rates in excess of 70%. Previous studies by our group has demonstrated that this is due to differences in cervical sperm transport. However, a potentially important contributory factor is that ewes are inseminated to a natural oestrous in Norway but to a synchronised oestrous across most of the rest of the world. In this study, we interrogated the gene expression of the sheep cervix of four ewe breeds with known differences in pregnancy rates following cervical AI using frozen-thawed semen under the effect of exogenous hormones to synchronise the oestrous cycle. These four ewe breeds (n = 8 to 11 ewes per breed) are from two countries: Ireland (Belclare and Suffolk; medium and low fertility, respectively) and Norway (Norwegian White Sheep (NWS) and Fur; both with high fertility compared to the Irish ewe breeds). Results RNA extracted from cervical biopsies collected from these breeds was analysed by RNA-sequencing and differential gene expression analysis. Using the low-fertility Suffolk breed as a reference level; 27, 1827 and 2641 genes were differentially expressed in Belclare, Fur and NWS ewes, respectively (P < 0.05 and FC > 1.5). Gene ontology (GO) analysis revealed that Fur and NWS had an up-regulation of enriched pathways involved in muscle contraction and development compared to Suffolk. However, there was a down-regulation of the immune response pathway in NWS compared to Suffolk. In addition, GO analysis showed similar expression patterns involved in muscle contraction, extracellular matrix (ECM) development and cell-cell junction in both Norwegian ewe breeds, which differed to the Irish ewe breeds. Conclusions This novel study has identified a number of conserved and breed-specific biological processes under the effect of oestrous synchronisation that may impact cervical sperm transport during the follicular phase of the reproductive cycle. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08603-8.
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Affiliation(s)
- Laura Abril-Parreño
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Biomaterials Research Cluster, Bernal Institute, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
| | - Kieran G Meade
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | | | - Xavier Druart
- UMR 6175 INRA, CNRS-Université de Tours-Haras Nationaux, Station de Physiologie de la Reproduction et des Comportements Institut National de la Recherche Agronomique, Nouzilly, France
| | - Paul Cormican
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co, Meath, Ireland
| | - Sean Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Biomaterials Research Cluster, Bernal Institute, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland.
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16
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Guner B, Kulaksiz R, Saat N, Kisadere I, Ozturkler M, Dalginli KY, Pancarci SM. Effect of pre-synchronisation with progestogen and eCG on reproductive activity in synchronised ewes during anoestrous season. VET MED-CZECH 2022; 67:231-239. [PMID: 39170905 PMCID: PMC11334142 DOI: 10.17221/244/2020-vetmed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 01/27/2022] [Indexed: 08/23/2024] Open
Abstract
The objective of the study was to investigate the effect of pre-synchronisation on the occurrence of the oestrus and pregnancy rate after fixed time artificial insemination (FTAI) in synchronised ewes during the anoestrous season. Kivircik ewes (n = 84) were randomly assigned to one of the two treatment groups with (PRE; n = 42) or without (SYN; n = 42) pre-synchronisation. In the SYN group, the ewes were subjected to a 7-d short-term protocol (P4 insertion-6d-PGF2α-1d-P4 removal + eCG). In the PRE group, the same short-term protocol as in the SYN group was applied with 7 days apart for a pre-synchronised synchronisation protocol. A cervical FTAI was performed with fresh semen at 54 h after sponge removal. At the beginning of the synchronisation protocol, the oestrous response (66.7% vs. 0.0%) and cyclicity rates (64.3% vs. 14.3%) based on progesterone (P4) were higher in the PRE group compared to those in the SYN group, respectively (P < 0.01). However, the oestrous response after synchronisation was lower within 96 h (57.1% vs. 95.2%; P < 0.01) in the PRE group compared to that in the SYN group. Although the pregnancy rate after the FTAI was significantly (P < 0.05) lower in the PRE group (14.3%) than the SYN group (35.7%), the overall pregnancy rate after natural mating was not different (95.2%) between the groups. In conclusion, the pre-synchronisation decreased the oestrous response leading to a lower pregnancy rate after the FTAI in the synchronised ewes during the anoestrous season. Thus, attention should be paid to two consecutive administrations of eCG in a pre-synchronisation and synchronisation protocol in ewes.
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Affiliation(s)
- Baris Guner
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Balikesir University, Balikesir, Turkey
| | - Recai Kulaksiz
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Balikesir University, Balikesir, Turkey
| | - Nevzat Saat
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Balikesir University, Balikesir, Turkey
| | - Ihsan Kisadere
- Department of Physiology, Faculty of Veterinary Medicine, Balikesir University, Balikesir, Turkey
| | - Melek Ozturkler
- Department of Chemistry, Faculty of Science and Letters, Kafkas University, Kars, Turkey
| | - Kezban Yildiz Dalginli
- Department of Chemistry and Chemical Processing Technologies, Kars Vocational High School, Kafkas University, Kars, Turkey
| | - Sukru Metin Pancarci
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Balikesir University, Balikesir, Turkey
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17
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Minteguiaga MA, Banchero G, Fierro S, Adrien ML, Olivera-Muzante J. Impact of focus feeding on reproductive losses, prolificacy, or fecundity of estrous synchronized ewes. Livest Sci 2022. [DOI: 10.1016/j.livsci.2021.104817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Shokry DM, Abd Eldaim MA, Badr MR, Khalifa HK, Orabi SH, Hassan AM, Dohreig R. Enhancement impact of Moringa oleifera leaves extract–base extender on cryopreservation and fertilization of Barki ram sperms: comparative study with vitamin E and selenium combination. ITALIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1080/1828051x.2021.1953411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Dina M. Shokry
- Department of Artificial Insemination and Embryo Transfer, Animal Reproduction Research Institute, Agriculture Research Center, Giza, Egypt
| | - Mabrouk Attia Abd Eldaim
- Department of Biochemistry and Chemistry of Nutrition, Faculty of Veterinary Medicine, Menoufia University, Sheben Elkom, Egypt
| | - Magdy R. Badr
- Department of Artificial Insemination and Embryo Transfer, Animal Reproduction Research Institute, Agriculture Research Center, Giza, Egypt
| | - Hanem K. Khalifa
- Department of Biochemistry and Chemistry of Nutrition, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Egypt
| | - Sahar H. Orabi
- Department of Biochemistry and Chemistry of Nutrition, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Egypt
| | - Aziza M. Hassan
- Department of Biotechnology, College of Science, Taif University, Taif, Saudi Arabia
| | - Ragab Dohreig
- Department of Artificial Insemination and Embryo Transfer, Animal Reproduction Research Institute, Agriculture Research Center, Giza, Egypt
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19
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Arrais AM, Mello MRBD, Vergani GB, Figueira LM, Esteves SN, Pereira VSDA, Bartlewski PM, Oliveira MEF, Souza-Fabjan JMG, Fonseca JFD. NonSurgical Embryo Recovery from Estrus-Synchronized or Superovulated Morada Nova Ewes: A Feasible Strategy for Sheep Embryo Banking. Biopreserv Biobank 2021; 19:360-368. [PMID: 33769085 DOI: 10.1089/bio.2020.0125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study assessed the feasibility of in vivo embryo production and nonsurgical embryo recovery (NSER) in Morada Nova ewes (an endangered native Brazilian breed of sheep) subjected to different estrus synchronization and/or superovulation protocols. Ewes received intravaginal sponges soaked with 60 mg medroxyprogesterone acetate (MAP), which were kept in place for six (G6; n = 12), nine (G9; n = 12), or 12 (G12; n = 12) days. Half of the ewes in each group remained estrus synchronized only (SYNCH) and the other half was superovulated (SOV) with 133 mg porcine follicle-stimulating hormone (pFSH). There were no differences (p > 0.05) in antral follicle counts determined with ultrasonography 60 hours before MAP sponge removal (or at the time of the first pFSH dose) among G6 (6.4 ± 0.9), G9 (6.2 ± 0.7), and G12 (5.5 ± 0.6). Estrus responses and NSER success rates did not vary (p > 0.05) among the three progestin-treatment groups of ewes for either estrus-induced or superovulated animals. The onset of estrus occurred 10-12 hours later (p < 0.01) in G9SYNCH ewes compared with G6SYNCH and G12SYNCH, and the duration of estrus was ∼19 hours greater (p < 0.01) in G9SOV than in G6SOV. The average duration of the NSER procedure was 32.6 ± 1.3 minutes. At least one structure was recovered in 85.7% of synchronized and in 87.5% of superovulated ewes. Viable embryo recovery rates were also similar (p > 0.05) for G6 (1.0 ± 0.3 and 2.5 ± 1.5), G9 (1.3 ± 0.5 and 4.8 ± 2.0), and G12 groups (1.0 ± 0.3 and 4.8 ± 2.3; estrus-synchronized and superovulated ewes, respectively). In conclusion, progestogen pretreatment of different durations and NSER can be employed in Morada Nova ewes, resulting in reasonable viable embryo recovery rates in both estrus-synchronized and superovulated animals. Therefore, both techniques are suitable for use in commercial settings as well as small ruminant conservation programs.
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Affiliation(s)
- Aline Matos Arrais
- Departamento de Reprodução e Avaliação Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
| | | | - Gabriel Brun Vergani
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, Brazil
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20
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Silveira DC, Vargas SF, Oliveira FC, Barbosa RM, Knabah NW, Goularte KL, Vieira AD, Baldassarre H, Gasperin BG, Mondadori RG, Lucia T. Pharmacological approaches to induce follicular growth and ovulation for fixed-time artificial insemination treatment regimens in ewes. Anim Reprod Sci 2021; 228:106734. [PMID: 33780710 DOI: 10.1016/j.anireprosci.2021.106734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 03/01/2021] [Accepted: 03/03/2021] [Indexed: 10/22/2022]
Abstract
In Experiment I, during the non-breeding season, after intravaginal devices containing progesterone (P4) were withdrawn (n = 28), estrous rates were greater with treatment with 400 IU eCG (P < 0.05) than with FSH (10 and 15 mg) and no treatment. During the breeding season (n = 147), estrous and pregnancy rates after fixed-time artificial inseminations (FTAI) were similar among groups: 300 IU eCG; 10 mg FSH; and control (P > 0.05). In Experiment II (non-breeding season), ewes of one group were treated with 300 IU eCG (n = 8) and of two groups were treated with 10 mg FSH. In one FSH group, 250 μg estradiol benzoate (EB) were administered after 24 h (n = 9); in the other, 4 μg GnRH were administered after 36 h (n = 10). Serum P4 concentrations were greater in eCG-treated ewes (P < 0.05). Estrous rates were similar for the eCG- and FSH plus EB-treated ewes (P > 0.05). In Experiment III (breeding season), the treatments were: 300 IU eCG; 250 μg estradiol cypionate; 250 μg EB; or control (n = 22). Follicular growth was greater for eCG-treated ewes within 0-24 h and for control ewes within 48-72 h (P = 0.001). Although estrous and ovulation rates did not differ (P > 0.05), all eCG-treated ewes had ovulations. During the non-breeding season, FSH treatment promoted follicular growth but did not induce ovulations. For FTAI regimens, eCG was more effective than FSH plus GnRH and estradiol esters in inducing estrus and ovulation.
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Affiliation(s)
- D C Silveira
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - S F Vargas
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - F C Oliveira
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - R M Barbosa
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - N W Knabah
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - K L Goularte
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - A D Vieira
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - H Baldassarre
- Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
| | - B G Gasperin
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - R G Mondadori
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Instituto de Biologia, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil
| | - T Lucia
- ReproPel, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Faculdade de Veterinária, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil.
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21
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Gonzalez-Bulnes A, Menchaca A, Martin GB, Martinez-Ros P. Seventy years of progestagen treatments for management of the sheep oestrous cycle: where we are and where we should go. Reprod Fertil Dev 2021; 32:441-452. [PMID: 31972122 DOI: 10.1071/rd18477] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 08/10/2019] [Indexed: 01/08/2023] Open
Abstract
Management of the ovine oestrous cycle is mainly based on the use of exogenous hormones to mimic or enhance (progesterone and its analogues) or manipulate (prostaglandin F2α and its analogues) the activity of the corpus luteum, combined with the application of other hormones mimicking the pituitary secretion of gonadotrophins (e.g. equine chorionic gonadotrophin). These protocols have been applied without major change for decades but, now, there are two reasons to reconsider them: (1) our greatly improved knowledge of the dynamics of ovarian physiology, following the application of transrectal ultrasonography, indicates that modification of the protocols may improve fertility yields and (2) increasing concerns about animal health and welfare, food safety and the environmental impact of the treatments, as evidenced by public opinion and therefore market forces. Here, we offer an overview of these issues, introduce an updated protocol and suggest ways for future improvements to the protocols.
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Affiliation(s)
- Antonio Gonzalez-Bulnes
- Departamento de Reproduccion Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Avenida, Puerta de Hierro, s/n, 28040, Madrid, Spain; and Departamento de Toxicologia y Farmacologia, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria, s/n, 28040, Madrid, Spain; and Corresponding author.
| | - Alejo Menchaca
- Instituto de Reproducción Animal Uruguay, Fundación Instituto de Reproduccion Animal del Uruguay, Camino Cruz del Sur 2350, Montevideo, Uruguay; and Programa de Posgrado, Facultad de Veterinaria, Universidad de la República, Avenida Lasplaces, 1550, Montevideo, Uruguay
| | - Graeme B Martin
- Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Paula Martinez-Ros
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera- Centro de Estudios Universitarios (CEU), CEU Universities, C/ Tirant lo Blanc, 7. 46115 Alfara del Patriarca Valencia, Spain
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22
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Côrtes LR, Souza-Fabjan JMG, Dias DS, Martins BB, Maia ALRS, Veiga MO, Arashiro EKN, Brandão FZ, Oliveira MEF, Bartlewski PM, Fonseca JF. Administration of a single dose of 300 IU of human chorionic gonadotropin seven days after the onset of estrus improves pregnancy rate in dairy goats by an unknown mechanism. Domest Anim Endocrinol 2021; 74:106579. [PMID: 33161234 DOI: 10.1016/j.domaniend.2020.106579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 12/17/2022]
Abstract
This study examined the effects of exogenous hCG administration on ovarian function and pregnancy rates in estrous-induced dairy goats during the transition into the breeding season. Eighty-six Toggenburg does received 60 mg of medroxyprogesterone acetate intravaginal sponge for 6 d plus 200 IU of equine chorionic gonadotropin and 30 μg of d-cloprostenol i.m. 24 h before sponge removal, and were then bred for 96 h. Seven days (D7) after first mating the does received either 1 mL of saline (the control group, n = 43) or 300 IU of hCG (the hCG-treated group, n = 43) i.m. Transrectal ovarian ultrasonography (B-mode and color Doppler) was performed on D7, D13, D17, and D21 and ultrasonographic pregnancy detection on D30. Pregnancy rate was higher (P < 0.05) in hCG-treated goats (90.7%; 39/43) than that in control animals (74.4%; 32/43). Accessory luteal structures (ALSs) were detected in 46.5% (20/43) of hCG-treated does. All hCG-treated does that had ALSs and 82.6% of goats without ALS post-treatment remained pregnant. The total luteal area increased (P < 0.05) from D7 to D13 in pregnant animals of both groups, whereas mean vascular area declined (P < 0.05) by D21 in all nonpregnant does. Serum progesterone concentrations increased (P < 0.05) on D21 in pregnant goats of both groups, but they were related to changes in luteal tissue content only in control does throughout the present study. Mean daily numbers of small- and medium-sized antral follicles decreased (P < 0.05) only in pregnant animals of both groups with a decline in medium follicle numbers occurring earlier in hCG-treated (D13) compared with control does (D17). To summarize, a single dose of hCG given on D7 after estrus was followed by a decrease in the number of medium-sized antral follicles in gestating hCG-treated does, induced the formation of ALSs in ~47% of all hCG-treated does, and significantly increased the pregnancy rate in estrous-induced Toggenburg goats in the transition to the breeding season.
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Affiliation(s)
- L R Côrtes
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, Niterói, Rio de Janeiro, Brazil
| | - J M G Souza-Fabjan
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, Niterói, Rio de Janeiro, Brazil
| | - D S Dias
- Faculdade de Medicina Veterinária, Universidade do Grande Rio, Rua Professor José de Souza Herdy, 1160 Duque de Caxias, Rio de Janeiro, Brazil
| | - B B Martins
- Universidade Presidente Antônio Carlos, Av. Juiz de Fora, 1100 Juiz de Fora, Minas Gerais, Brazil
| | - A L R S Maia
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, Niterói, Rio de Janeiro, Brazil
| | - M O Veiga
- Embrapa Caprinos e Ovinos, Rodovia MG 133, km 42, Coronel Pacheco, Minas Gerais, Brazil
| | - E K N Arashiro
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, Niterói, Rio de Janeiro, Brazil
| | - F Z Brandão
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, Niterói, Rio de Janeiro, Brazil
| | - M E F Oliveira
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Via de Acesso Prof. Paulo Donato Castelane, s/n, Zona Rural, Jaboticabal, São Paulo, Brazil
| | - P M Bartlewski
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - J F Fonseca
- Embrapa Caprinos e Ovinos, Rodovia MG 133, km 42, Coronel Pacheco, Minas Gerais, Brazil.
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Vergani GB, Fonseca JFD, Trevizan JT, Pereira VSDA, Garcia AR, Esteves SN, Brandão FZ, Souza-Fabjan JMG, Oliveira MEF. Luteotropic effects of human chorionic gonadotropin administered 7.5 days after synchronous estrous induction in Morada Nova ewes. Anim Reprod Sci 2020; 223:106644. [PMID: 33197710 DOI: 10.1016/j.anireprosci.2020.106644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 10/23/2022]
Abstract
This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 μg d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhance the total number of lambs born.
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Affiliation(s)
- Gabriel Brun Vergani
- Department of Pathobiology and Veterinary Theriogenology, School of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, SP, Brazil
| | - Jeferson Ferreira da Fonseca
- Embrapa Caprinos e Ovinos, Rodovia MG 133, Km 42, Cep 36.155-000, Coronel Pacheco, MG, Brazil; Departamento de Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n, CEP 36570-000, Viçosa, MG, Brazil.
| | - Juliane Teramachi Trevizan
- Department of Pathobiology and Veterinary Theriogenology, School of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, SP, Brazil
| | | | - Alexandre Rossetto Garcia
- Embrapa Pecuária Sudeste, Rodovia Washington Luiz, Km 234 s/nº, Fazenda Canchim, Caixa Postal: 339, CEP: 13560-970, São Carlos, SP, Brazil
| | - Sergio Novita Esteves
- Embrapa Pecuária Sudeste, Rodovia Washington Luiz, Km 234 s/nº, Fazenda Canchim, Caixa Postal: 339, CEP: 13560-970, São Carlos, SP, Brazil
| | - Felipe Zandonadi Brandão
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil
| | | | - Maria Emilia Franco Oliveira
- Department of Pathobiology and Veterinary Theriogenology, School of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, SP, Brazil; Embrapa Caprinos e Ovinos, Rodovia MG 133, Km 42, Cep 36.155-000, Coronel Pacheco, MG, Brazil.
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Gore D, Mburu J, Okeno T, Muasya T. Short-term oestrous synchronisation protocol following single fixed-time artificial insemination and natural mating as alternative to long-term protocol in dairy goats. Small Rumin Res 2020. [DOI: 10.1016/j.smallrumres.2020.106207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lv C, Larbi A, Memon S, Liang J, Zhao X, Shao Q, Wu G, Quan G. The proteomic characterization of ram sperm during cryopreservation analyzed by the two-dimensional electrophoresis coupled with mass spectrometry. Cryobiology 2020; 97:37-45. [PMID: 33068554 DOI: 10.1016/j.cryobiol.2020.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 11/16/2022]
Abstract
The aim of this study was to analyze the effects of the cryopreservation process on the protein profile of ram sperm using two-dimensional electrophoresis (2-DE) coupled with mass spectroscopy. Semen was collected from five rams and cryopreserved in a Tris-based extender supplemented with glycerol and egg yolk as the main cryoprotectants. The fresh and post-thaw sperm total proteins were extracted and purified, followed by the 2-DE. The differential proteins in the stained gel were determined by mass spectrometry. The results indicated that there were 39 differential proteins between fresh sperm and frozen-thawed sperm. Among these proteins, the abundance of 28 proteins in fresh sperm was higher than those in post-thaw sperm (P < 0.05). However, 11 proteins in post-thaw sperm were up-regulated instead. The gene ontology (GO) analysis showed that most of differential proteins were implicated in cellular process, metabolism and regulation of the biological process. The networks of protein-protein interaction indicated a strong interaction among these differential proteins, which may be involved in sperm metabolism, acrosomal function, sperm motility, and reducing ROS level. In conclusion, the cryopreservation process modifies the proteome of ram sperm, which may be directly associated with ram sperm cryodamage, consequently influencing their fertility. Additionally, these differential proteins can be used as biomarkers for evaluation of frozen ram semen quality.
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Affiliation(s)
- Chunrong Lv
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China; Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Jindian, Panlong County, Kunming, Yunnan province, China
| | - Allai Larbi
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China
| | - Sameeullah Memon
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China; Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Jindian, Panlong County, Kunming, Yunnan province, China
| | - Jiachong Liang
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China
| | - Xueming Zhao
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS); No.2 Yuanmingyuan Western Road, Haidian, Beijing, 100193, China
| | - Qingyong Shao
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China; Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Jindian, Panlong County, Kunming, Yunnan province, China
| | - Guoquan Wu
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China; Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Jindian, Panlong County, Kunming, Yunnan province, China.
| | - Guobo Quan
- Yunnan Animal Science and Veterinary Institute, Jindian, Panlong County, Kunming, Yunnan province, China; Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Jindian, Panlong County, Kunming, Yunnan province, China.
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Véliz-Deras FG, Meza-Herrera CA, Mellado M, Contreras-Villarreal V, Gaytán-Alemán LR, Guillén-Muñoz JM. The Effect of P4 + eCG Estrus Induction Protocol during the Deep and the Transition Anestrous Period on the Reproductive Performance of Crossbred Dairy Goats. BIOLOGY 2020; 9:biology9100311. [PMID: 32987953 PMCID: PMC7600110 DOI: 10.3390/biology9100311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/14/2020] [Accepted: 09/22/2020] [Indexed: 11/24/2022]
Abstract
Simple Summary The effect of an ultra-short progesterone (P4) plus equine chorionic gonadotropin (eCG) based estrus induction protocol during deep seasonal anestrous, or the reproductive transition period upon reproductive performance in an arid environment (26° N) was assessed. Results confirm a multidimensional response of goats regarding the effectiveness of P4 + eCG estrus induction protocols, mainly modulated by a specific time within the anestrous season (June) or even by specific management or a particular environment at herd level (herd 1 in this study), although, it is quite remarkably non–dependent on the animal’s body weight or body condition score. Abstract Seasonal reproduction restricts the offering of goat commodities across the year. Therefore, it is crucial to improve diverse strategies to induce the reproductive response in goats during the anestrus stage. The effectiveness of a short P4 + eCG-based estrus induction protocol during both the deep anestrous (March) or the reproductive transition period (June) upon the reproductive performance of crossbred dairy goats was assessed. Adult, anestrous, 24–30-month- old dairy crossbred (Saanen–Alpine–Nubian × Criollo) goats (n = 123) from two commercial herds and 10 sexually active goat bucks were used. Before the trials, the anestrous status of goats was confirmed. Then, goats were randomly allocated into two different experiments. In Exp. 1, we tested the effect of different doses (D) of intramuscular progesterone (P4; 10 or 20 mg + eCG (100 UI)) and type of breeding (TB), natural mating (NM), or artificial insemination (AI), on two commercial goat herds (H1 & H2), in March (deep anestrous). In Exp. 2, we evaluated the effect of D (P4; 10 or 20 mg + 100 UI eCG) in goats subjected to NM, and either during deep anestrous (March; M) or transitional anestrous (June; J), in two commercial herds. After breeding, conception and pregnancy were diagnosed with ultrasound scanning. The response variables were estrus induction (EI; %), estrus latency (EL; h), ovulation (OVP; %), ovulation rate (OR; units), fertility (FERT; %), and pregnancy (PREG; %). No differences (p > 0.05) in live weight (LW) and body condition score (BCS) occurred between herds in both trials. In Exp. 1, EI, EL, OVP, OR, FERT, and PREG were affected (p < 0.05) by the H–TB–D interaction, whereas in H1 + P4–20 combination had the highest (p < 0.05) EI, EL, and OVP values. Irrespective of TB, H1 had the largest (p < 0.05) OR, independently of TB or D. Also, the lowest (p < 0.05) OVP occurred in the AI + P4–10 group, while the AI had the lowest (p < 0.05) FERT, irrespective of D. FERT and PREG were two-fold higher (p < 0.05) in NM compared with AI. In Exp. 2, EI, EL, OVP, OR, FERT, and PREG were affected (p < 0.05) by the H–M–D interaction. In general, H2 + P4–10 had the lowest (p < 0.05) reproductive outcomes in March, whereas H1 had the largest (p < 0.05) values in either month. No differences (p > 0.05) between P4 doses occurred for EI, OVP, OR, FERT, and PREG. Yet, the largest (p < 0.05) EL occurred with P4–20 in June. No correlations (p > 0.05) occurred between LW and all the reproductive variables. BCS was positively correlated (p < 0.05) with EI (0.34), OVP (0.44), OR (0.58), and PREG (0.20). Also, positive correlations (p < 0.05) occurred between EI with EL (0.83), OVP (0.80), OR (0.64), and PREG (0.56); EL with OVP (0.58), OR (0.44), and PREG (0.42); OVP with OR (0.79) and PREG (0.70), as well as OR and PREG (0.63). Results of these studies confirm a multidimensional response regarding the effectiveness of P4 + eCG for estrus induction in goats mainly modulated by a specific time within the anestrous season, or even by specific management or a particular environment at the herd level (H1), although quite remarkably independent of the animal’s LW or BCS at herd level. Moreover, the best reproductive outcomes occurred with NM in June. The most reproductive variables were similar using either 10 or 20 mg P4 + 100 IU eCG, giving the possibility to lessen the scale in the use of exogenous hormones while obtaining acceptable out of season reproductive response.
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Affiliation(s)
- Francisco G. Véliz-Deras
- Unidad Laguna, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Coahuila, Mexico; (F.G.V.-D.); (M.M.); (V.C.-V.); (L.R.G.-A.)
| | - César A. Meza-Herrera
- Unidad Regional Universitaria de Zonas Áridas, Universidad Autónoma Chapingo, Bermejillo, Durango 35230, Mexico;
| | - Miguel Mellado
- Unidad Laguna, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Coahuila, Mexico; (F.G.V.-D.); (M.M.); (V.C.-V.); (L.R.G.-A.)
| | - Viridiana Contreras-Villarreal
- Unidad Laguna, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Coahuila, Mexico; (F.G.V.-D.); (M.M.); (V.C.-V.); (L.R.G.-A.)
| | - Leticia R. Gaytán-Alemán
- Unidad Laguna, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Coahuila, Mexico; (F.G.V.-D.); (M.M.); (V.C.-V.); (L.R.G.-A.)
| | - Juan M. Guillén-Muñoz
- Unidad Laguna, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Coahuila, Mexico; (F.G.V.-D.); (M.M.); (V.C.-V.); (L.R.G.-A.)
- Correspondence: or
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Carvalho-de-Paula CJ, Souza-Fabjan JMG, Gonçalves JD, Dias JH, de Souza GN, Oliveira MEF, Fonseca JF. Effect of a 12-h increment in the short-term treatment regimen on ovarian status, estrus synchrony, and pregnancy rate in artificially inseminated dairy goats. Anim Reprod Sci 2020; 221:106571. [PMID: 32861121 DOI: 10.1016/j.anireprosci.2020.106571] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 11/29/2022]
Abstract
This study was conducted to assess effects of two hormonal treatments on ovarian follicular status, estrous synchrony and fertility in dairy goats during the non-breeding season when duration of progestogen device use varied by 12 h. In both experiments, does were administered 60 mg of medroxyprogesterone acetate via intravaginal devices, respectively, for 6 and 6.5 d (G6 and G6.5). At 24 or 36 h before device removal, 200 IU of eCG im and 30 μg d-cloprostenol im were administered. In Experiment 1 (n = 24), data related to sexual behavior and that were collected using ovarian ultrasonography were recorded, and in Experiment 2 (n = 83) fertility was assessed after Flexible Time Artificial Insemination (FxTAI). The interval from device removal to estrus was shorter (P < 0.05) after imposing the G6.5 treatment regimen. Diameter of largest and second-largest ovarian follicles and interval from device removal to ovulation were similar (P> 0.05) between groups. The does treated with the G6.5 hormonal regimen had greater estrous synchrony, associated with greater development of largest follicles at the time of device removal, which might have led to a lesser fertility rate (P > 0.05). Conversely, treatment with the G6 hormonal regimen resulted in a greater conception rate. In conclusion, increasing time the intravaginal device is inserted from 6 to 6.5 d resulted in greater estrous synchrony, advanced ovarian follicular development, abnormal CL function and lesser pregnancy rates in artificially inseminated dairy goats when there were treatments during the non-breeding season.
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Affiliation(s)
- Cleber Jonas Carvalho-de-Paula
- Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil
| | | | - Joedson Dantas Gonçalves
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane, s/n, CEP 14884-900, Jaboticabal, SP, Brazil
| | | | - Guilherme Nunes de Souza
- Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil; Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610 - Dom Bosco, CEP:36038-330, Juiz de For a, MG, Brazil
| | - Maria Emilia Franco Oliveira
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane, s/n, CEP 14884-900, Jaboticabal, SP, Brazil; Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, km 04, CP 145, CEP 62010-970, Sobral, CE, Brazil
| | - Jeferson Ferreira Fonseca
- Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n, CEP 36570-000, Viçosa, MG, Brazil; Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, km 04, CP 145, CEP 62010-970, Sobral, CE, Brazil.
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Año-Perello A, Santos-Jimenez Z, Encinas T, Martinez-Ros P, Gonzalez-Bulnes A. Use of GnRH for Synchronization of the Follicular Wave in Assisted Reproductive Technologies in Sheep: A Preliminary Study. Animals (Basel) 2020; 10:E1208. [PMID: 32708594 PMCID: PMC7401646 DOI: 10.3390/ani10071208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/28/2020] [Accepted: 07/13/2020] [Indexed: 11/16/2022] Open
Abstract
The present study aimed to set up a short-term protocol for synchronization of follicular wave emergence in sheep, concomitant with estrus synchronization, which would improve ovarian response in assisted reproductive technologies. Administration of a single GnRH dose, concomitant with the insertion of a progesterone-loaded CIDR device, caused regression of gonadotrophin-dependent follicles ≥4 mm in all the GnRH-treated sheep and in around 80% of the controls treated only with CIDR (p < 0.05). Similar percentages of ewes lost all follicles (around 70%) or only the largest one (around 30%) in both groups. Hence, 54.1% and 70% of the sheep lost all large follicles and initiated a new follicular wave in the control and GnRH groups, respectively (p < 0.05). The remaining sheep showed follicles that were still not dependent of luteinizing hormone (LH). So, in fact, all the sheep had non-dominant follicles after treatment. In conclusion, a treatment including GnRH at CIDR insertion would offer a time- and cost-efficient protocol for inducing follicular turnover and synchronizing a new follicular wave at any stage of the estrous cycle.
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Affiliation(s)
- Aina Año-Perello
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Tirant lo Blanc, 7. 46115 Alfara del Patriarca Valencia, Spain; (A.A.-P.); (A.G.-B.)
| | - Zurisaday Santos-Jimenez
- Departamento Ciencias Medico Veterinarias, Universidad Autónoma Agraria Antonio Narro, Torreón, 25315 Coahuila, Mexico;
- Departamento de Farmacologia y Toxicologia Facultad de Veterinaria, UCM, Ciudad Universitaria s/n, 28040 Madrid, Spain;
| | - Teresa Encinas
- Departamento de Farmacologia y Toxicologia Facultad de Veterinaria, UCM, Ciudad Universitaria s/n, 28040 Madrid, Spain;
| | - Paula Martinez-Ros
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Tirant lo Blanc, 7. 46115 Alfara del Patriarca Valencia, Spain; (A.A.-P.); (A.G.-B.)
| | - Antonio Gonzalez-Bulnes
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Tirant lo Blanc, 7. 46115 Alfara del Patriarca Valencia, Spain; (A.A.-P.); (A.G.-B.)
- Departamento de Farmacologia y Toxicologia Facultad de Veterinaria, UCM, Ciudad Universitaria s/n, 28040 Madrid, Spain;
- Departamento de Reproduccion Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Avda. Puerta de Hierro s/n. 28040-Madrid, Spain
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Graña-Baumgartner A, Meikle A, Fernández-Foren A, Neimaur K, Barrera N, Cuadro F, Santos-Neto PCD, Bosolasco D, Núñez-Olivera R, Crispo M, Menchaca A, de Brun V. Local influence of the corpus luteum on the ipsilateral oviduct and early embryo development in the ewe. Theriogenology 2020; 151:7-15. [DOI: 10.1016/j.theriogenology.2020.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 03/11/2020] [Accepted: 03/23/2020] [Indexed: 12/17/2022]
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Olivera-Muzante J, Fierro S, Minteguiaga MA. Long interval prostaglandin-based treatment regimens do not affect ovulatory or prolificacy rates of multiparous ewes after cervical fixed timed AI. Anim Reprod Sci 2020; 218:106482. [PMID: 32507262 DOI: 10.1016/j.anireprosci.2020.106482] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 01/16/2023]
Abstract
To evaluate effects of a longer, than conventional, interval between time of prostaglandin F2α (PG)-based administrations in a PG-based treatment regimen for fixed timed AI (FTAI) on ovulation rate (OR), non-estrous return rate on Day 21 subsequent to the time of AI (NRR21), as well as conception, prolificacy and fecundity rates, ewes were assigned to two groups. Ewes of treatment group (PG15) were estrous-synchronized using two PG doses 15 days apart and FTAI was conducted at 56 h after the second PG administration (Day 0). Ewes of the Control group (SE) had imposed a pre-estrous synchrony treatment regimen with two PG doses 7 days apart and AI was conducted after detection of spontaneous estrus from 17 to 19 days after the second PG administration (Day 0). Ovulation rate on Day 8, NRR21, conception, prolificacy and fecundity rates on Day 60 were evaluated. There were no differences (P > 0.05) between ewes of the PG15 and SE groups in OR (1.47 ± 0.50 and 1.54 ± 0.50, respectively) or prolificacy (1.42 ± 0.80 and 1.33 ± 0.62, respectively), however, there were lesser values (P< 0.05) in the PG15 than SE group for NRR21 (65.2% and 91.3%, respectively), conception (59.8% and 91.3%, respectively) and fecundity (84.8% and 120%, respectively). The longer interval with the PG-based treatment regimen does not affect OR and prolificacy, but there is a lesser NRR21, conception and fecundity rate in comparison to ewes of the Control group.
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Affiliation(s)
- J Olivera-Muzante
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Departamento de Ovinos, Lanas y Caprinos, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, 60000 Paysandú, Uruguay.
| | - S Fierro
- Secretariado Uruguayo de la Lana (S.U.L.), Área de Transferencia de Tecnología, Servando Gómez 2408, 12100 Montevideo, Uruguay
| | - M A Minteguiaga
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Departamento de Salud en los Sistemas Pecuarios, Facultad de Veterinaria. EEMAC, Universidad de la República. Ruta 3 km 363, 60000 Paysandú, Uruguay
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Murtaza A, Khan MIUR, Abbas M, Hameed N, Ahmad W, Mohsin I, Tahir MZ. Optimal timing of artificial insemination and changes in vaginal mucous characteristics relative to the onset of standing estrus in Beetal goats. Anim Reprod Sci 2019; 213:106249. [PMID: 31987315 DOI: 10.1016/j.anireprosci.2019.106249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 10/01/2019] [Accepted: 11/21/2019] [Indexed: 11/25/2022]
Abstract
The current study was conducted to determine the optimal timing of artificial insemination and vaginal mucous characteristics relative to the onset of estrus in goats. Does (n = 257) were estrous synchronized using hormonal treatments. Intracervical inseminations with fresh semen were performed at 0, 12, 24 and 36 h after the onset of estrus. Characteristics of vaginal mucus (i.e., color, consistency, and volume) were observed and graded at the time of AI to calculate cumulative mucous score. The vaginal electrical resistance (VER) was recorded (Draminski® detector) at the time of AI. Pregnancy rate was less (P < 0.05) when inseminations occurred at 0 h (28.6%) compared with 12 (58.3%) and 24 h (56.4%) after the onset of estrus; however, pregnancy rate at 36 h (54.5%) did not differ (P> 0.05) compared with inseminations at 0, 12 or 24 h after estrous onset. Relative odds for pregnancy rate at 12, 24 and 36 h were 5.24, 5.20 and 3.29 times greater compared with 0 h. Cumulative mucous score varied (P < 0.05) relative to the onset of estrus and correlated well (P < 0.05) with the color and consistency than volume of the mucus. The VER was less (P < 0.05) at 12 than 0 and 36 h after estrous onset. In conclusion, goats can be inseminated between 12-36 h after the onset of estrus; however, the chances of pregnancy are greater with inseminations at the 12 or 24 h time periods.
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Affiliation(s)
- Ali Murtaza
- Department of Theriogenology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | | | - Mustansar Abbas
- Department of Theriogenology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Nasir Hameed
- Department of Theriogenology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Waqas Ahmad
- Department of Theriogenology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Imran Mohsin
- Department of Livestock Production, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Zahid Tahir
- Department of Theriogenology, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Figueira LM, Alves NG, Souza-Fabjan JMG, Oliveira MEF, Lima RR, Souza GN, Fonseca JF. Preovulatory follicular dynamics, ovulatory response and embryo yield in Lacaune ewes subjected to synchronous estrus induction protocols and non-surgical embryo recovery. Theriogenology 2019; 145:238-246. [PMID: 31753477 DOI: 10.1016/j.theriogenology.2019.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 10/29/2019] [Accepted: 11/06/2019] [Indexed: 10/25/2022]
Abstract
The objective of this study was to assess the effect of the duration of progesterone-based estrus induction protocols on preovulatory follicular dynamics, ovulatory response, and embryo yield after non-surgical embryo recovery (NSER) in Lacaune ewes. Females received acetate medroxyprogesterone intravaginal sponges for six (G-6; n = 14) or nine (G-9; n = 14) days plus d-cloprostenol and eCG 24 h before sponge removal (Day 0). Preovulatory follicular dynamics and the luteal characteristics are evaluated by B-mode and Color-Doppler ultrasonography. NSER was performed five to six days after ovulation. The estrous behavior rate was 85.7% for both groups, and the percentage of ewes that ovulated was 92.9% in G-6 and 100% in G-9. The day of wave emergence (relative to Day 0) did not differ (P > 0.05) between G-6 (-3.0 ± 0.5) and G-9 (-4.2 ± 0.5). The number of follicles of size 4.1-5.0 mm was higher (P < 0.05) in G-9 (1.4 ± 0.2) compared to G-6 (0.8 ± 0.2) during the Days -4 to 0. At NSER, the transcervical penetration rate was 95.2% (20/21) and its duration time was lower (P < 0.05) in G-9 (3.4 ± 0.6 min) than in G-6 (7.2 ± 1.3 min). The number of ovulations and viable embryos was higher (P < 0.05) in G-9 (2.9 ± 0.3 and 1.3 ± 0.4, respectively) than in G-6 (1.9 ± 0.3 and 0.4 ± 0.2, respectively). In conclusion, the 9-day protocol promoted higher ovulation rate and embryo yield; moreover, the cervical dilation treatment allowed NSER in a high percentage of Lacaune ewes.
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Affiliation(s)
- Lucas Machado Figueira
- Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil; Universidade Federal Fluminense Federal, Rua Vital Brazil Filho, 64, CEP 24220-008, Niterói-RJ, Brazil
| | - Nadja Gomes Alves
- Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil.
| | | | - Maria Emilia Franco Oliveira
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Via de Acesso Prof. Paulo Donato Castelane, s/n, Zona Rural, CEP 14884-900, Jaboticabal, SP, Brazil
| | - Renato Ribeiro Lima
- Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil
| | - Guilherme Nunes Souza
- Universidade Federal Fluminense Federal, Rua Vital Brazil Filho, 64, CEP 24220-008, Niterói-RJ, Brazil; Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610 - Dom Bosco, CEP 36038-330, Juiz de Fora, MG, Brazil
| | - Jeferson Ferreira Fonseca
- Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, Km 4, CP D10, CEP 62011-000, Sobral, CE, Brazil.
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Bonato GC, Maia ALRS, Côrtes LR, Oliveira TA, Arrais AM, Figueira LM, Oliveira MEF, Souza-Fabjan JMG, Fonseca JF. Effects of d-cloprostenol administrations with 7.5 and 11.5-day intervals between administrations on pregnancy rates after artificial insemination in estrous cyclic dairy goats. Anim Reprod Sci 2019; 209:106172. [PMID: 31514929 DOI: 10.1016/j.anireprosci.2019.106172] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/13/2019] [Accepted: 08/20/2019] [Indexed: 11/19/2022]
Abstract
This study was conducted to evaluate effects of two administrations of d-cloprostenol at different intervals to synchronize the time of estrus and ovulation among estrous cyclic goats. In Experiment 1, 32 does were treated with 30 μg d-cloprostenol at 7.5 (T7.5, n = 16) or 11.5-day (T11.5, n = 16) intervals. In Experiment 2, the same treatments were administered and there was AI of the does (T7.5, n = 40 and T11.5, n = 38). In Experiment 1, ultrasonic assessments of ovaries were conducted at the time of the second administration of d-cloprostenol, every 12 h until detection of ovulation, and 7 days after estrous onset to detect the corpora lutea, as well as for pregnancy diagnosis 40 days after AI. In Experiment 1, the estrous response (90.6%, 29/32) was similar (P > 0.05) in both groups. Diameter of the largest follicle at the time of administration of the second dose was larger (P = 0.01) in the T7.5 than T11.5 group (7.0 compared with 5.7 mm), while the values for ovarian variables were similar (P > 0.05). In Experiment 2, the greatest (P < 0.001) synchrony in timing of initiation of estrus in does (T7.5 = 83.3% and T11.5 = 50.0%) occurred after the second day (36-48 h). The pregnancy rate tended (P = 0.0836) to be greater for does in the T7.5 (71.4%, 40/56) than T11.5 (55.6%, 30/54) group. With use of both protocols, there were acceptable estrous synchronization and pregnancy rates in estrous cyclic dairy goats.
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Affiliation(s)
- G C Bonato
- Programa de Pós-graduação em Medicina Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n, CEP 36570-000, Viçosa, MG, Brazil
| | - A L R S Maia
- Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil
| | - L R Côrtes
- Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil
| | - T A Oliveira
- Medicina Veterinária, Universidade Presidente Antônio Carlos, Av. Juiz de Fora, 1100, 36047-362, Juiz de Fora, MG, Brazil
| | - A M Arrais
- Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Rodovia BR 465, Km 07 Zona Rural, CEP 23890-000, Seropédica, RJ, Brazil
| | - L M Figueira
- Programa de Pós-graduação em Zootecnia, Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001, CEP 37200-000, Lavras, MG, Brazil
| | - M E F Oliveira
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane, s/n, CEP 14884-900, Jaboticabal, SP, Brazil
| | - J M G Souza-Fabjan
- Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil
| | - J F Fonseca
- Programa de Pós-graduação em Medicina Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n, CEP 36570-000, Viçosa, MG, Brazil; Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, km 04, CP 145, CEP 62010-970, Sobral, CE, Brazil.
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Camacho M, Garza D, Gauly M, Holtz W. Superovulation of Boer goats with different synchronization regimens at different times of the year in the northern temperate zone. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.06.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Olivera-Muzante J, Fierro S, Alabart JL, Claramunt M, Minteguiaga MA, Aunchayna G, Errandonea N, Banchero G. Short-term dietary protein supplementation improves reproductive performance of estrous-synchronized ewes when there are long intervals of prostaglandin or progesterone-based treatments for timed AI. Anim Reprod Sci 2019; 206:78-84. [PMID: 31153619 DOI: 10.1016/j.anireprosci.2019.05.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 05/09/2019] [Accepted: 05/23/2019] [Indexed: 11/15/2022]
Abstract
To evaluate the reproductive effects of a short-term dietary protein supplementation (Days -10 to -3) before timed AI (TAI = Day 0), 471 Merino ewes grazing native pastures were estrous-synchronized when there were either long intervals between prostaglandin administrations (two prostaglandin injections 15 or 16 d apart; PG15 and PG16, respectively) or with a progesterone-eCG (P4-eCG) protocol, resulting in a 3 × 2 experimental design. Ovulation rate on Day 8 (OR), non-estrous-return to Day 21 (NRR21), and fertility, prolificacy and fecundity on Day 70 were evaluated. The interaction between estrous synchronization protocol and supplementation was not significant for any of these variables (P > 0.05). Supplementation increased OR, prolificacy and fecundity (+0.14, +0.15 and +0.14, respectively, P < 0.01), but did not affect NRR21 or fertility of ewes (+6.2% and +6.7% respectively, P > 0.05). Ewes treated using the PG15 and PG16 protocols had a lesser OR (-0.27), prolificacy (-0.22) and fecundity (-0.20) than ewes treated using P4-eCG protocol (P < 0.01 for each), and similar NRR21 and fertility (-5.4% and -7.9% respectively, P > 0.05 for both variables), without significant differences between the PG15 and PG16 groups. In conclusion, a short-term dietary protein supplementation before TAI improved OR, prolificacy and fecundity of ewes which were estrous-synchronized by imposing long interval PG (15 or 16 d apart) or P4-eCG-based protocols. There was a greater OR, prolificacy and fecundity when there was use of the P4-eCG compared to long interval PG-based protocols. Estrous-non-return rate after AI and fertility as a result TAI were not affected by either the supplementation or the estrous synchronization protocols used.
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Affiliation(s)
- J Olivera-Muzante
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Departamento de Ovinos, Lanas y Caprinos, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, 60000, Paysandú, Uruguay.
| | - S Fierro
- Secretariado Uruguayo de la Lana (S.U.L.), Área de Transferencia de Tecnología, Servando Gómez 2408, 12100, Montevideo, Uruguay.
| | - J L Alabart
- Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Gobierno de Aragón, Av. Montañana 930, 50059, Zaragoza, Spain; Instituto Agroalimentario de Aragón - IA2 (CITA-Universidad de Zaragoza), Calle Miguel Servet 177, 50013, Zaragoza, Spain.
| | - M Claramunt
- Grupo multidisciplinario de ecología para la agricultura, Centro Universitario Regional Este, Universidad de la República, Ruta 8 km 292, Treinta y Tres, Uruguay.
| | - M A Minteguiaga
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Departamento de Salud en los Sistemas Pecuarios, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, 60000, Paysandú, Uruguay.
| | - G Aunchayna
- Veterinary Doctor, Liberal Exercise of Profession, Mercedes, Soriano, Uruguay.
| | - N Errandonea
- Veterinary Doctor, Liberal Exercise of Profession, Tomás Gomensoro, Artigas, Uruguay.
| | - G Banchero
- Instituto Nacional de Investigación Agropecuaria (INIA), Programa Nacional de Carne y Lana, Ruta 50 km 12, Colonia, Uruguay.
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El Kadili S, Raes M, Bister JL, Beckers JF, Amzati G, Archa B, Chentouf M, Kirschvink N. Evaluation of different hormonal treatments on oestral and ovarian responses in Moroccan Beni Arouss goats during anoestrus and breeding season. Reprod Domest Anim 2019; 54:1003-1009. [PMID: 31058368 DOI: 10.1111/rda.13454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/30/2019] [Indexed: 11/29/2022]
Abstract
The efficacy of eight combinations of fluorogestone acetate (FGA, 20 or 40 mg as intravaginal device during 11 days), equine chorionic gonadotropin (eCG, 300 or 500 UI injected 48 hr before FGA removal) and prostaglandin F2α (cloprostenol, 0 or 50 μg injected 48 hr before FGA removal) aiming at induction and synchronization of oestrus and ovulation was evaluated during the anoestrus season in spring and during the breeding season in autumn in adult Beni Arouss goats. Oestrous behaviour was recorded between 12 and 60 hr after FGA removal. Blood samplings allowing to assess onset of the pre-ovulatory LH surge and increase of progesterone as sign of an active corpus luteum were performed, respectively, between 20 and 60 hr and 3, 5, 8 and 15 days after FGA removal. No season-related differences (spring vs. autumn) were observed for oestrous response (95% vs. 93%), pre-ovulatory LH surge (94% vs. 84%) and luteal response after 3-8 and 11-15 days post-treatment (respectively 92% vs. 66% and 92% vs. 98%). The onset of oestrus (21 [13-53] vs. 32 [12-54] hr) and LH surge (26 [20-60] vs. 38 [22-60] hr) occurred significantly later in autumn. FGA (40 vs. 20 mg) in autumn significantly delayed the onset of oestrus (36 [16-54] vs. 23 [12-47] hr) and LH surge (44 [26-58] vs. 33 [22-60] hr). Significant treatment-related differences were recorded for onset of LH surge (earliest for 20 mg FGA, 300 IU eCG, 50 μg PGF2α ) and onset of luteal phase (latest for 40 mg FGA, 300 IU eCG, 50 μg PGF2α ). In conclusion, the hormone combinations tested appeared equally effective in terms of oestrous and ovulation rates. Season has influenced significantly the onset of oestrus and LH surge, and the high dose regimen of FGA delayed the ovarian response in autumn.
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Affiliation(s)
- Sara El Kadili
- Integrated Veterinary Research Unit, Department of Veterinary Medicine, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium.,Department of Animal Production, Ecole Nationale d'Agriculture de Meknès, Meknes, Morocco
| | - Marianne Raes
- Integrated Veterinary Research Unit, Department of Veterinary Medicine, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Jean-Loup Bister
- Integrated Veterinary Research Unit, Department of Veterinary Medicine, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | | | - Gaston Amzati
- Integrated Veterinary Research Unit, Department of Veterinary Medicine, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Bouchaib Archa
- Department of Animal Production, Ecole Nationale d'Agriculture de Meknès, Meknes, Morocco
| | - Mouad Chentouf
- Regional Center of Tangier, Institut National de la Recherche Agronomique, Tangier, Morocco
| | - Nathalie Kirschvink
- Integrated Veterinary Research Unit, Department of Veterinary Medicine, Faculty of Sciences, Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
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Efficiency of CIDR-Based Protocols Including GnRH Instead of eCG for Estrus Synchronization in Sheep. Animals (Basel) 2019; 9:ani9040146. [PMID: 30987248 PMCID: PMC6523624 DOI: 10.3390/ani9040146] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 03/29/2019] [Accepted: 04/01/2019] [Indexed: 12/27/2022] Open
Abstract
Simple Summary This study examines the preovulatory and ovulatory events (in terms of the timing of onset of estrus behavior, preovulatory LH surge, and ovulation) and the yields obtained (in terms of ovulation rate, progesterone secretion, and fertility) after insertion of controlled internal drug release (CIDR) devices for 5 days and treatment with equine chorionic gonadotrophin (eCG) or gonadotrophin-releasing hormone (GnRH). Abstract The present study examined, for meat sheep (Segureña breed; 2–5-years old, mean body score of 3.5 ± 0.5), the timings of onset of estrus behavior, preovulatory luteinizing hormone (LH) surge and ovulation, and the ovulation rate and fertility obtained after insertion of controlled internal drug release (CIDR) devices for 5 days plus treatment with equine chorionic gonadotrophin (eCG; single dose at CIDR removal, n = 19 ewes) or gonadotrophin-releasing hormone (GnRH, either in a single dose at 56 h after CIDR removal, group CIDR-GnRH, n = 19 ewes; or in one dose at CIDR insertion and another dose 56 h after CIDR removal, group GnRH-CIDR-GnRH, n = 19 ewes). In all the ewes, the appearance of estrus behavior ranged between 84% and 90% and all females showing estrus signs had subsequent preovulatory LH peaks and ovulations. Onset of these events was earlier in the CIDR-eCG group than in the CIDR-GnRH and GnRH-CIDR-GnRH groups (p < 0.05). These differences were mainly determined by the onset of estrus behavior, since timing and intervals of LH peak and ovulation were similar among treatments. In fact, the range of ovulations was narrower in the GnRH-CIDR-GnRH group, which suggests better synchronization of follicular growth (p < 0.05). In conclusion, protocols with two doses of GnRH offer similar yields to eCG protocols.
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Martinez-Ros P, Gonzalez-Bulnes A, Garcia-Rosello E, Rios-Abellan A, Astiz S. Effects of short-term intravaginal progestagen treatment on fertility and prolificacy after natural breeding in sheep at different reproductive seasons. JOURNAL OF APPLIED ANIMAL RESEARCH 2019. [DOI: 10.1080/09712119.2019.1599899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Paula Martinez-Ros
- Dpto. Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, Valencia, Spain
| | - Antonio Gonzalez-Bulnes
- Dpto. de Reproduccion Animal, INIA Madrid, Spain
- Dpto. de Toxicologia y Farmacologia, Facultad de Veterinaria, UCM, Madrid, Spain
| | - Empar Garcia-Rosello
- Dpto. Medicina y Cirugía Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, Valencia, Spain
| | - Alejandro Rios-Abellan
- Dpto. Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, Valencia, Spain
| | - Susana Astiz
- Dpto. de Reproduccion Animal, INIA Madrid, Spain
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Lv C, Wu G, Hong Q, Quan G. Spermatozoa Cryopreservation: State of Art and Future in Small Ruminants. Biopreserv Biobank 2019; 17:171-182. [DOI: 10.1089/bio.2018.0113] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Chunrong Lv
- Yunnan Animal Science and Veterinary Institute, Kunming, China
- Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming, China
- Yunnan Provincial Meat Caprine Engineering Research Center, Kunming, China
| | - Guoquan Wu
- Yunnan Animal Science and Veterinary Institute, Kunming, China
- Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming, China
- Yunnan Provincial Meat Caprine Engineering Research Center, Kunming, China
| | - Qionghua Hong
- Yunnan Animal Science and Veterinary Institute, Kunming, China
- Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming, China
- Yunnan Provincial Meat Caprine Engineering Research Center, Kunming, China
| | - Guobo Quan
- Yunnan Animal Science and Veterinary Institute, Kunming, China
- Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming, China
- Yunnan Provincial Meat Caprine Engineering Research Center, Kunming, China
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Llanes A, Whisnant CS, Knox WB, Farin CE. Assessment of ovulation synchronization protocols in goats and use of pregnancy specific protein B (PSPB) enzyme linked immunsorbent assay (ELISA) to determine kid number at birth. Domest Anim Endocrinol 2019; 67:54-62. [PMID: 30690258 DOI: 10.1016/j.domaniend.2018.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/13/2018] [Accepted: 11/22/2018] [Indexed: 11/25/2022]
Abstract
The efficacy of several protocols for ovulation synchronization and timed artificial insemination (TAI) in goats was examined. In addition, the relationship between levels of pregnancy specific protein B (PSPB) during gestation assessed with a commercially available ELISA and the number of offspring at birth was determined. In Experiment 1, 70 does were randomized into four treatments: (1) breed by estrus [BBE], (2) 6-d treatment with a new [C6N], (3) once-used [C61], or (4) twice-used Controled Internal Drug Release (CIDR) device [C62)]. BBE does received two 15 mg doses of prostaglandin-F2α (PGF) at a 10-d interval and were bred 12 h after estrus onset. CIDR groups received a CIDR for 6 d with 15 mg PGF given at CIDR removal. TAI was performed 48 h after CIDR removal and does were given 50 μg GnRH. All does were inseminated with a single dose of frozen semen using a non-surgical, transcervical technique. Pregnancy rates for the BBE, C6N, C61 and C62 treatment groups were 39% ± 12%, 64% ± 12%, 77% ± 12% and 57% ± 12%, respectively, and did not differ. Reuse of CIDRs, even with reuse extending for a total of 21 d, was as effective as new CIDRs for synchronization of ovulation. In Experiment 2, 68 does were randomized into four treatments: (1) BBE, (2) C6N, (3) NC.Synch [NCS], (4) modified NCS [NCSM]. The BBE and C6N groups were as described for Experiment 1. The NCS and NCSM groups received 15 mg PGF on Day 1, 50 μg GnRH on Day 8 and 15 mg PGF on Day 15 (NCS) or Day 15.5 (NCSM). Does were bred by TAI at 72 h (NCS) or 60 h (NCSM) after the second PGF injection. All does in the NCS and NCSM groups received 50 μg GnRH at TAI. Pregnancy rates were 53% ± 12%, 30% ± 11%, 50% ± 11% and 41% ± 12% for does in the BBE, C6N, NCS and NCSM group, respectively, and did not differ. In Experiment 3, 62 does pregnant to TAI were bled at Days 48 and 85 post-insemination for PSPB. Data on kid numbers and birth weights were subsequently recorded. At Day 48 of gestation, PSPB levels for does birthing singletons were lower than for does birthing twins or triplets (25.0 ± 0.1a, 28.8 ± 0.1b and 30.7 ± 0b ng/mL, respectively, abP<0.05). At Day 85 of gestation, PSPB levels were progressively greater for does birthing singletons versus twins versus triplets (27.0 ± 0.1a, 28.5 ± 0.1b and 31.6 ± 0c ng/mL, abcP<0.05). In conclusion, PSPB concentrations detected using a commercially available ELISA at Day 48 or 85 of gestation could distinguish does carrying single versus multiple fetuses.
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Affiliation(s)
- A Llanes
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - C S Whisnant
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - W B Knox
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - C E Farin
- Department of Animal Science, North Carolina State University, Raleigh, NC.
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Alvarado-Espino AS, Menchaca A, Meza-Herrera CA, Carrillo-Moreno DI, Zúñiga-García S, Arellano-Rodríguez F, Mellado M, Véliz FG. Ovarian response is not affected by the stage of seasonal anestrus or breed of goats when using a progesterone injection plus human chorionic gonadotropin-based protocol. Anim Reprod Sci 2019; 204:60-65. [PMID: 30862404 DOI: 10.1016/j.anireprosci.2019.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 02/27/2019] [Accepted: 03/06/2019] [Indexed: 12/01/2022]
Abstract
The aim of this study was to evaluate the effect of the stage of seasonal anestrus and breed on ovarian response in non-estrous cycling goats using a progesterone (P4) injection plus human chorionic gonadotropin (hCG)-based protocol. In Experiment 1, non-estrous cycling local Mexican goats were treated with 20 mg of P4 plus 100 IU of hCG injections 24 h apart during April (early anestrus, n = 13) or June (late anestrus, n = 12). The estrous response, interval from hCG-to-estrus, and interval to ovulation were not affected by season (P > 0.05). In addition, the size of the follicle from which ovulation occurred and the size of the corpus luteum were not different between the two stages of seasonal anestrus (P > 0.05). In Experiment 2, the estrous response was compared between multiparous non-estrous cycling local Mexican (n = 18) and Alpine (n = 19) goats in which stage of the estrous cycle was synchronized using the same P4+hCG protocol as in Experiment 1. Neither the onset of estrus nor the time of ovulation differed between breeds, and the estrus-to-ovulation interval also was similar for both breeds (P > 0.05). The diameter of the dominant follicle at the time of ovulation was similar between local and Alpine goats (P > 0.05). In addition, the pregnancy rate was not different for both local and Alpine goats (P > 0.05). In conclusion, results of this study indicate that the stage of seasonal anestrus or breed do not modify estrous and ovarian response in non-estrous cyclic goats synchronized with a P4 injection plus hCG-based protocol.
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Affiliation(s)
- Alan S Alvarado-Espino
- Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - Alejo Menchaca
- Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Cno. Cruz del Sur 2250, 12200, Montevideo, Uruguay
| | - Cesar A Meza-Herrera
- Universidad Autónoma Chapingo, Unidad Regional Universitaria de Zonas Áridas, Bermejillo, Durango, 35230, Mexico
| | - Dalia I Carrillo-Moreno
- Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - Santiago Zúñiga-García
- Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - Fernando Arellano-Rodríguez
- Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - Miguel Mellado
- Universidad Autónoma Agraria Antonio Narro, Departamento de Nutrición Animal, Calz. Antonio Narro 1923, 25084, Saltillo, Coahuila, Mexico
| | - Francisco G Véliz
- Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico.
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Use of injectable progesterone and hCG for fixed-time artificial insemination during the non-breeding season in goats. Theriogenology 2019; 127:21-25. [DOI: 10.1016/j.theriogenology.2018.12.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 12/18/2018] [Accepted: 12/20/2018] [Indexed: 12/31/2022]
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Biehl MV, de Ferraz Junior MVC, Barroso JPR, Susin I, Ferreira EM, Polizel DM, Pires AV. The reused progesterone device has the same effect on short or long estrus synchronization protocols in tropical sheep. Trop Anim Health Prod 2019; 51:1545-1549. [PMID: 30778808 DOI: 10.1007/s11250-019-01841-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 02/07/2019] [Indexed: 11/30/2022]
Abstract
This study aimed to evaluate the effect of progesterone (P4) device reutilization in long and short protocols for transcervical timed artificial insemination (TAI) in Santa Inês ewes. A total of 275 multiparous lactating ewes were blocked according to body weight (BW, 49.1 ± 7.3 means ± SE), body condition score (BCS, 2.9 ± 0.4; scale of 1-5), and days postpartum (50 ± 8.2 days), and allocated to one of the treatments. The treatments were arranged in a factorial design, in which the factor 1 was the P4 device type (new or a device of 0.3 g of P4 previously used by 11 days), and the factor 2 was the short or long TAI protocol (P4 device remained by 7 or 11 days, respectively). At device removal, all ewes received 300 IU eCG and 6.70 mg of Dinoprost tromethamine. After TAI protocol, ewes remained with ram by 21 days. There was no interaction between factors in any variables. Ewes that received a new P4 device delayed (P = 0.05) to show estrus compared with ewes receiving a previously used P4 device, but it did not affect pregnancy rate. The long protocol tended to increase pregnancy rate compared with short protocol (33% vs. 24%, respectively; P = 0.07). However, the pregnancy rate at the end of reproductive period was similar in both groups (about 84%). Thus, the use of long protocols tended to improve reproductive performance, and the reused P4 device did not affect pregnancy rate.
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Affiliation(s)
- Marcos Vinicius Biehl
- Departamento de Zootecnia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil
| | | | - José Paulo Roman Barroso
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Pirassununga, SP, 13635-000, Brazil
| | - Ivanete Susin
- Departamento de Zootecnia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil
| | - Evandro Maia Ferreira
- Departamento de Zootecnia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil
| | - Daniel Montanher Polizel
- Departamento de Zootecnia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil
| | - Alexandre Vaz Pires
- Departamento de Zootecnia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, 13418-900, Brazil. .,Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Pirassununga, SP, 13635-000, Brazil. .,Animal Science Department, University of Sao Paulo - ESALQ, Pádua Dias, Piracicaba, SP, Brazil.
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Martinez-Ros P, Rios-Abellan A, Gonzalez-Bulnes A. Influence of Progesterone-Treatment Length and eCG Administration on Appearance of Estrus Behavior, Ovulatory Success and Fertility in Sheep. Animals (Basel) 2018; 9:E9. [PMID: 30587794 PMCID: PMC6357198 DOI: 10.3390/ani9010009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/11/2018] [Accepted: 12/24/2018] [Indexed: 11/17/2022] Open
Abstract
The present study characterizes, for sheep, the occurrence and timing of the onset of estrus behavior and ovulation and the yields obtained (ovulation rate, progesterone secretion, and fertility) after Controlled Internal Drug Release (CIDR) insertion for five, six, seven, or fourteen days, with or without equine chorionic gonadotrophin (eCG) in ewes of the Segureña meat breed. All the treatments showed above 80% of females displaying estrus, but the onset of estrus was earlier and more synchronized when using eCG and, among groups with eCG, onset of estrus was earlier in the sheep treated for 14 days than in the short-term treatments (p < 0.05 for all). Administration of eCG after either short- or long-term treatments assured the occurrence of fertile ovulations in all the animals. Conversely, ovulatory success without eCG was found to be dependent on treatment length, with a high percentage of animals ovulating after five days of treatment (83.3%) and very low percentages after treatment for six or seven days (40% and 20%, respectively). Ovulation rate and progesterone secretion were similar among animals ovulating, but ovulation failures predetermined the fertility yields obtained in response to the treatments. Hence, the best results were found after treatment for 14 days plus eCG, and for 5 days without eCG (83.3 for both, p < 0.05 when compared to the other groups with different treatment lengths and with or without eCG).
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Affiliation(s)
- Paula Martinez-Ros
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Tirant lo Blanc, 7, Alfara del Patriarca, 46115 Valencia, Spain.
| | - Alejandro Rios-Abellan
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Tirant lo Blanc, 7, Alfara del Patriarca, 46115 Valencia, Spain.
| | - Antonio Gonzalez-Bulnes
- Departamento de Reproduccion Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Avda. Puerta de Hierro s/n. 28040 Madrid, Spain.
- Departamento de Toxicologia y Farmacologia, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria s/n. 28040 Madrid, Spain.
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Intravaginal Device-Type and Treatment-Length for Ovine Estrus Synchronization Modify Vaginal Mucus and Microbiota and Affect Fertility. Animals (Basel) 2018; 8:ani8120226. [PMID: 30501021 PMCID: PMC6316288 DOI: 10.3390/ani8120226] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 11/20/2018] [Accepted: 11/24/2018] [Indexed: 12/18/2022] Open
Abstract
Simple Summary This study examined the effects of different intravaginal device types used for estrous cycle management in sheep, and the timing of their insertion, on vaginal features (characteristics of vaginal mucus discharge, pH and microbiota) and fertility under field conditions. Abstract Induction and synchronization of estrus and ovulation in sheep is based on intravaginal progestagen-impregnated polyurethane sponges or progesterone-loaded silicon-based devices (CIDR), in either short- (6–7 days) or long-term (12–14 days) protocols. Bearing in mind that the use of intravaginal sponges in long-term protocols has been related to the presence of vaginitis at removal, we compared the effects of sponges and CIDRs, maintained during either 7 or 14 days, on vaginal features (characteristics of vaginal mucus discharge, pH and microbiota) and fertility under field conditions. Almost all the ewes treated with intravaginal sponges showed vaginal discharge at device withdrawal, which was purulent and/or bloody in around 15% and 80% of the females treated for 7 and 14 days, respectively. The vaginal pH and microbiota changed in both groups when compared to control sheep, especially in ewes treated for 14 days, which showed a pH value around 8 and a higher incidence of Salmonella spp. and Staphylococcus aureus. On the other hand, independently of the length of the treatment, only around 15–20% of the sheep treated with CIDRs evidenced vaginal discharge (p < 0.00005 when compared to sponge groups), and such discharge was scarce, clear, and showed no changes in vaginal pH and microbiota when compared to control sheep. Fertility yields were associated with vaginal features, being higher in both short-term treatments (75%) and the long-term CIDR-based treatment (70%) than in the long-term sponge-based treatment (45%).
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Martinez-Ros P, Astiz S, Garcia-Rosello E, Rios-Abellan A, Gonzalez-Bulnes A. Effects of short-term intravaginal progestagens on the onset and features of estrus, preovulatory LH surge and ovulation in sheep. Anim Reprod Sci 2018; 197:317-323. [DOI: 10.1016/j.anireprosci.2018.08.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/25/2018] [Accepted: 08/29/2018] [Indexed: 11/24/2022]
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Martinez-Ros P, Astiz S, Garcia-Rosello E, Rios-Abellan A, Gonzalez-Bulnes A. Onset of estrus and preovulatory LH surge and ovulatory efficiency in sheep after short-term treatments with progestagen-sponges and progesterone-CIDRs. Reprod Domest Anim 2018; 54:408-411. [DOI: 10.1111/rda.13317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/22/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Paula Martinez-Ros
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria; Universidad Cardenal Herrera-CEU, CEU Universities; Valencia Spain
| | - Susana Astiz
- Departamento de Reproduccion Animal; INIA; Madrid Spain
| | - Empar Garcia-Rosello
- Departamento de Medicina y Cirugia Animal, Facultad de Veterinaria; Universidad Cardenal Herrera-CEU, CEU Universities; Valencia Spain
| | - Alejandro Rios-Abellan
- Departamento de Produccion y Sanidad Animal, Facultad de Veterinaria; Universidad Cardenal Herrera-CEU, CEU Universities; Valencia Spain
| | - Antonio Gonzalez-Bulnes
- Departamento de Reproduccion Animal; INIA; Madrid Spain
- Departamento de Toxicologia y Farmacologia, Facultad de Veterinaria; UCM Madrid; Madrid Spain
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Cuadro F, dos Santos-Neto P, Pinczak A, Barrera N, Crispo M, Menchaca A. Serum progesterone concentrations during FSH superstimulation of the first follicular wave affect embryo production in sheep. Anim Reprod Sci 2018; 196:205-210. [DOI: 10.1016/j.anireprosci.2018.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/23/2018] [Accepted: 08/08/2018] [Indexed: 11/29/2022]
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Swelum AAA, Saadeldin IM, Moumen AF, Ali MA, Alowaimer AN. Efficacy of controlled internal drug release (CIDR) treatment durations on the reproductive performance, hormone profiles, and economic profit of Awassi ewes. Small Rumin Res 2018. [DOI: 10.1016/j.smallrumres.2018.07.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Errandonea N, Fierro S, Viñoles C, Gil J, Banchero G, Olivera-Muzante J. Short term protein supplementation during a long interval prostaglandin-based protocol for timed AI in sheep. Theriogenology 2018; 114:34-39. [PMID: 29597121 DOI: 10.1016/j.theriogenology.2018.03.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/23/2018] [Accepted: 03/14/2018] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the reproductive impact of a short-term protein supplementation on a long interval prostaglandin-based protocol (two PG injections 15 d apart; PG15) for timed artificial insemination in sheep. During the breeding season, 437 multiparous Merino ewes grazing native pastures (forage allowance of 6 kg of dry matter/100 kg of live weight; crude protein: 10.8%, metabolic energy: 2.1 Mcal/kg of dry matter) were selected. Ewes were allocated, according to body condition score (3.2 ± 0.2) and body weight (40.6 ± 4.9 kg, mean ± SD), to a 2 × 2 factorial design: type of estrus -spontaneous estrus (SE) or induced with PG15 (PG15)-, and supplementation (yes or no) before insemination (+FF; soybean meal at Days -10 to -3; crude protein: 51.9%, metabolic energy: 2.8 Mcal/kg of dry matter; average consumption 0.9% live weight/ewe/day of dry matter). All ewes were cervically artificial inseminated (Day -2 to -3 in SE ewes at estrus detection; Day 0 = timed artificial insemination in PG15 ewes). Ovulation rate on Day 7, non-return to service on Day 23, conception, fertility, prolificacy and fecundity on Day 60 were evaluated. Ovulation rate (1.17 ± 0.40 vs. 1.06 ± 0.25), non-return to service at Day 23 (81.7 vs. 64.2%), conception (78.8 vs. 61.5%), fertility (75.2 vs. 61.5%) and fecundity (0.77 vs. 0.62) were higher in ewes from SE than PG15 group (P < 0.05). However, no differences were observed in prolificacy (1.02 ± 0.16 vs. 1.01 ± 0,12) between groups (P > 0.05). Protein supplementation increased ovulation rate (1.30 ± 0.45 vs. 1.17 ± 0.40), prolificacy (1.18 ± 0.39 vs. 1.02 ± 0.16) and fecundity (0.94 vs. 0.77%; P < 0.05), but not non-return to service on Day 23 (83.8 vs. 81.7%), conception (82.9 vs. 78.8%) or fertility (79.1 vs. 75.2%; P > 0.05) in SE group. The supplement feed to PG15 ewes increased ovulation rate (1.35 ± 0.45 vs. 1.06 ± 0.25), prolificacy (1.25 ± 0.43 vs. 1.01 ± 0.12) and fecundity (0.79 vs. 0.62%; P < 0.05) to levels comparable to SE + FF ewes (P > 0.05). The magnitude of the increase in ovulation rate in PG15 was greater than in the SE group (27 vs. 11%; P < 0.05). However, non-return to service on Day 23 (65.1 vs. 64.2%), conception (63.3 vs 61.5%), and fertility rate (63.3 vs. 61.5%; P < 0.05) remained similar in PG15 supplemented or not supplemented ewes. In conclusion, a short-term protein supplementation before cervical time artificial insemination improved the reproductive performance of ewes synchronized with the PG15 protocol to levels comparable to the SE group.
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Affiliation(s)
- N Errandonea
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Facultad de Veterinaria, Universidad de la República, Ruta 3 km 363, 60000, Paysandú, Uruguay.
| | - S Fierro
- Secretariado Uruguayo de la Lana (S.U.L.), Área de Transferencia de Tecnología, Serbando Gómez 2408, 12100, Montevideo, Uruguay.
| | - C Viñoles
- Polo Agroforestal, EEBR, Universidad de la República, Ruta 26 km 408, Cerro Largo, Uruguay.
| | - J Gil
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Polo Producción Reproducción de Rumiantes, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, 60000, Paysandú, Uruguay.
| | - G Banchero
- Instituto Nacional de Investigación Agropecuaria (INIA), Programa Nacional de Carne y Lana, Ruta 50 km 12, Colonia, Uruguay.
| | - J Olivera-Muzante
- Laboratorio de Reproducción Animal "Dr. Alfredo Ferraris", Departamento de Ovinos, Lanas y Caprinos, Facultad de Veterinaria, EEMAC, Universidad de la República, Ruta 3 km 363, 60000, Paysandú, Uruguay.
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