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Roshan NJ, Garoussi MT, Akbarinejad V. Evaluation of the effect of melatonin implantation in rams and eCG dose in ewes synchronized by a CIDR-eCG protocol on reproductive performance of Lacaune sheep breed during non-breeding season. Anim Reprod Sci 2023; 259:107365. [PMID: 37980808 DOI: 10.1016/j.anireprosci.2023.107365] [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: 09/06/2023] [Accepted: 11/02/2023] [Indexed: 11/21/2023]
Abstract
Sustainable production of milk is favorable in dairy sheep industry, which necessitates year-round reproduction of rams and ewes even during non-breeding season. Hence, protocols facilitating reproduction of rams and ewes during non-breeding season are of importance for this purpose. Therefore, the present study was conducted to investigate the effect of melatonin implantation in rams and administration of 400 IU eCG (E400) versus 300 IU eCG (E300) in ewes on reproductive performance of Lacaune sheep breed during non-breeding season. Rams were allocated to two groups including untreated (control, CON; n = 36) and melatonin-treated (MEL; n = 37). A subset of rams from CON (n = 7) and MEL (n = 7) groups were used for assessment of scrotal circumference, kinematic and functional characteristics of sperm, total antioxidant capacity (TAC) of semen and circulating testosterone on Days 0 (the beginning of study) and 60 (60 days after melatonin implantation). Further, the study had a 2 × 2 factorial design with four experimental groups including 1) ewes treated with E300 and introduced to CON rams (E300CON; n = 17 rams and 172 ewes), 2) ewes treated with E300 and introduced to MEL rams (E300MEL; n = 18 rams and 177 ewes), 3) ewes treated with E400 and introduced to CON rams (E400CON; n = 19 rams and 192 ewes), and ewes treated with E400 and introduced to MEL rams (E400MEL; n = 19 rams and 190 ewes). Melatonin implantation improved scrotal circumference, concentration, progressive motility, velocity, mitochondrial membrane potential and viability of sperm, TAC of semen, concentration of testosterone and fertility of rams (P < 0.05). Besides, E400 compared with E300 enhanced synchronization of estrus and fertility in ewes (P < 0.05). In conclusion, melatonin implantation promoted reproductive performance in Lacaune rams, and increase in dose of eCG improved reproductive performance in Lacaune ewes.
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Affiliation(s)
- Navid Jahan Roshan
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | | | - Vahid Akbarinejad
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
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2
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Samartzi F, Theodosiadou EK, Vainas E, Saratsi A, Tsiligianni T, Rekkas CA. Plasminogen activator activity and plasminogen activator inhibition in the uterus of ewes after the induction of oestrus synchronization or superovulation, involving eCG. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Effect of equine chorionic gonadotropin on glycosidase activity in the reproductive tract of ewes, in relation to ovarian response and embryo yield. Small Rumin Res 2020. [DOI: 10.1016/j.smallrumres.2020.106186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Zonturlu AK, Kaçar C, Kaya S, Emre B, Korkmaz Ö, Arı UÇ. Effect of double GnRH injections on reproductive parameters in Awassi ewes receiving long-term progesterone. JOURNAL OF APPLIED ANIMAL RESEARCH 2018. [DOI: 10.1080/09712119.2018.1469497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Abuzer Kafar Zonturlu
- The Department of Obstetrics and Gynecology, University of Harran, Sanliurfa, Turkey
| | - Cihan Kaçar
- The Department of Obstetrics and Gynecology, University of Kafkas, Kars, Turkey
| | - Semra Kaya
- The Department of Obstetrics and Gynecology, University of Kafkas, Kars, Turkey
| | - Birten Emre
- The Department of Obstetrics and Gynecology, University of Harran, Sanliurfa, Turkey
| | - Ömer Korkmaz
- The Department of Obstetrics and Gynecology, University of Harran, Sanliurfa, Turkey
| | - Umut Çağın Arı
- The Department of Artificial Insemination and Reproduction, University of Kafkas, Kars, Turkey
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García-Salas A, Cortez-Romero C, Salazar-Ortiz J, Arroyo-Ledezma J, Ruíz-Vera VM, Vaquera-Huerta H, Gallegos-Sánchez J. Administration of exogenous hormones in ovulatory and embryonic response in Pelibuey sheep. Reprod Domest Anim 2017; 52:446-451. [DOI: 10.1111/rda.12930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 12/11/2016] [Indexed: 11/30/2022]
Affiliation(s)
- A García-Salas
- Genetic Resources and Productivity - Livestock; Colegio de Postgraduados; Montecillo, Texcoco, Estado de México Mexico
| | - C Cortez-Romero
- Genetic Resources and Productivity - Livestock; Colegio de Postgraduados; Montecillo, Texcoco, Estado de México Mexico
- Innovation in Natural Resource Management; Colegio de Postgraduados, Salinas de Hidalgo; San Luis Potosi Mexico
- Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados; Salinas de Hidalgo, San Luis Potosí Mexico
| | - J Salazar-Ortiz
- Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados; Salinas de Hidalgo, San Luis Potosí Mexico
- Sustainable Agro-Food Innovation; Colegio de Postgraduados; Córdoba, Veracruz Mexico
| | - J Arroyo-Ledezma
- Agricultural Sciences, Ciudad Universitaria; Universidad del Mar, Puerto Escondido; Oaxaca México
| | - VM Ruíz-Vera
- Innovation in Natural Resource Management; Colegio de Postgraduados, Salinas de Hidalgo; San Luis Potosi Mexico
| | - H Vaquera-Huerta
- Statistical Program; Colegio de Postgraduados; Montecillo, Texcoco, Estado de México México
| | - J Gallegos-Sánchez
- Genetic Resources and Productivity - Livestock; Colegio de Postgraduados; Montecillo, Texcoco, Estado de México Mexico
- Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados; Salinas de Hidalgo, San Luis Potosí Mexico
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6
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D’Alessandro AG, Martemucci G. Use of purified FSH and LH for embryo production, cryopreservation by conventional freezing or vitrification and transfer of embryos in dairy ewes. ITALIAN JOURNAL OF ANIMAL SCIENCE 2016. [DOI: 10.4081/ijas.2003.131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Zanetti EDS, Duarte JMB. Comparison of three protocols for superovulation of brown brocket deer (Mazama gouazoubira). Zoo Biol 2011; 31:642-55. [PMID: 22057947 DOI: 10.1002/zoo.20428] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 09/12/2011] [Accepted: 09/21/2011] [Indexed: 11/11/2022]
Abstract
This study aims to evaluate the ovulation rate and the presence of functional corpora lutea after treatment by three different protocols designed to cause superovulation in brown brocket deer. Six female received an intravaginal device containing 0.33 g of progesterone (CIDR®) for 8 days, followed by 0.5 mg injection of estradiol benzoate at the time of insertion and 265 µg of cloprostenol at the time of removal. Afterwards, the hinds were divided into three groups (n = 2): Treatment A received injection of 600 IU eCG on Day 4 after CIDR® insertion; Treatment B received injection of 300 IU eCG at the same time; and Treatment C received injection of 250 IU FSH dissolved in PVP, also on Day 4 post-insertion. The treatments were crossed over with 44-48 day intervals after CIDR® removal, such that all the deer were submitted to all three treatments. The mean ovulation rate (Treatment A = 3.40 ± 0.68, Treatment B = 1.40 ± 0.24, Treatment C = 0.80 ± 0.49), total ovarian stimulation (Treatment A = 4.80 ± 1.02, Treatment B = 1.80 ± 0.37, Treatment C = 1.40 ± 0.60), and mean CL diameter (Treatment A = 7.33 ± 0.76 mm, Treatment B = 3.94 ± 0.19 mm, Treatment C = 2.18 ± 0.49 mm) in Treatment A were significantly higher than the mean ovulation rates, total ovarian stimulation, and mean CL diameter in Treatments B and C. The mean fecal progesterone metabolites at the luteal phase in Treatment A (6,277.94±2,232.47 ng/g feces) was significantly different from Treatment C (1,374.82±401.77 ng/g feces). Thus, although fertility was not evaluated directly, Treatment A proved capable of induce superovulation in the species Mazama gouazoubira, presenting the greatest mean ovulation rates, with the formation of functional corpora lutea.
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Affiliation(s)
- Eveline dos Santos Zanetti
- Deer Research and Conservation Center (NUPECCE-Núcleo de Pesquisa e Conservação de Cervídeos), Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil.
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8
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Salehi R, Kohram H, Towhidi A, Moakhar HK, Honarvar M. Follicular development and ovulation rate following different superovulatory treatments in Chall ewes. Small Rumin Res 2010. [DOI: 10.1016/j.smallrumres.2010.05.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Estrous and fertility responses of dairy ewes synchronized with combined short term GnRH, PGF2α and estradiol benzoate treatments. Small Rumin Res 2010. [DOI: 10.1016/j.smallrumres.2010.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Simonetti L, Forcada F, Rivera OE, Carou N, Alberio RH, Abecia JA, Palacin I. Simplified superovulatory treatments in Corriedale ewes. Anim Reprod Sci 2008; 104:227-37. [PMID: 17331680 DOI: 10.1016/j.anireprosci.2007.01.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Accepted: 01/26/2007] [Indexed: 11/29/2022]
Abstract
Two experiments were designed to evaluate the possibility of simplifying superovulatory treatments in Corriedale ewes with use of ovine FSH (oFSH). Ewes received intravaginal progestogen sponges for 14 days. In Experiment 1, several simplified schedules were tested. Ewes were treated with 176 NIH-FSH-S1 units' oFSH given as a single injection in saline, along with 500 IU eCG 48 h before sponge removal (Group A1), in four equal doses (B1), or given as a single injection in a polyvinylpyrrolidone vehicle (C1) 24 h before sponge removal. In Experiment 2, the simplified protocol that exhibited the most desirable results in Experiment 1 (A2) was compared with the same protocol, but using less oFSH (132 units) (B2) and with the most conventional protocol (176 units of oFSH in eight decreasing doses; C2). Estrus was detected and ewes were naturally mated. The ovarian response and embryo production were assessed on Day 6 after estrus. LH was measured at 6h intervals from pessary withdrawal. The onset of estrus and the pre-ovulatory LH surge were advanced (P<0.05) in ewes treated with FSH and eCG. In Experiment 1, protocol A1 produced a greater percentage of superovulated ewes compared to C1 (100.0 compared with 58.3%; P<0.05), increased ovulation rate (13.8 corpora lutea compared with 6.2 and 4.7 for B1 and C1, respectively; P<0.05), and tended to increase the number of transferable embryos compared to B1 (P=0.08). In Experiment 2, percentages of superovulated ewes and ovulation rates were similar among groups; however, Group A2 tended to have more large follicles (P=0.07) than C2. The number of transferable embryos was similar among the three treatments. In conclusion, the reduced-dose oFSH given once along with eCG is the most appropriate superovulatory treatment because it combines simplicity and a lesser dose of gonadotropin, which also implies a reduction in cost, without reducing embryo production.
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Affiliation(s)
- L Simonetti
- Animal Production, School of Agrarian Sciences, National University of Lomas de Zamora, Ruta 4 Km. 2, 1836 Llavallol, Buenos Aires, Argentina.
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11
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Dixon TE, Hunter JW, Soler JP. Interspecific embryo transfer from mouflon (Ovis gmelini musimon) to domestic Corriedale sheep in Argentina. Anim Reprod Sci 2007; 101:158-62. [PMID: 17204378 DOI: 10.1016/j.anireprosci.2006.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2006] [Accepted: 12/06/2006] [Indexed: 11/22/2022]
Abstract
An interspecific embryo transfer program was conducted for genetic improvement and increasing the number of offspring from a flock of mouflon sheep in Argentina. The female donor mouflons were divided into three groups, G1 (n=5), G2 (n=4) and G3 (n=5). The total NIH-FSH-P1 dose given to each donor on the superovulatory treatment was 260, 200 and 160 mg for G1, G2 and G3, respectively. The mouflons in G3 were maidens, while the others were multiparous. Domestic Corriedale ewes (n=60) were synchronized and used as recipients. The embryo recovery and transfer was performed by a surgical method. Mouflons (n=13) responded to the superovulatory treatment with an average of 9.1+/-2.8 ovulations. A low incidence of early luteal regression was found (1 out of 14 donors). Embryo recovery rates were 60, 31 and 76% in groups G1, G2 and G3, respectively. The percentage of transferable embryos obtained in G1 and in G2 exceeded 80%. None of the embryos obtained from G3 were of transferable quality. In G1, 25 transferable embryos were recovered and transferred to 13 recipients, resulting in a pregnancy rate of 76.9% (10/13). In G2, 10 embryos were transferred to 5 recipients, resulting in a 60% pregnancy rate (3/5). Lambing rate was 60% (15/25) and 30% (3/10) for G1 and G2, respectively. Thirteen lambs were born to the 14 donors following natural service after the embryo recoveries. This study demonstrates that the application of IET technology would have great reproductive impact, especially when the donor mouflon hinds are selected according to age and reproductive history.
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Affiliation(s)
- T E Dixon
- ICPbio Ltd., PO Box 1607, Auckland, New Zealand
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12
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Liu X, Dai Q, Hart EJ, Barrett DMW, Rawlings NC, Pierson RA, Bartlewski PM. Ultrasonographic characteristics of ovulatory follicles and associated endocrine changes in cyclic ewes treated with medroxyprogesterone acetate (MAP)-releasing intravaginal sponges and equine chorionic gonadotropin (eCG). Reprod Domest Anim 2007; 42:393-401. [PMID: 17635777 DOI: 10.1111/j.1439-0531.2006.00798.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aim of this study was to assess the ultrasonographic characteristics of ovulatory follicles in cyclic Western White Face ewes (December) that had received intravaginal sponges containing medroxyprogesterone acetate (MAP; 60 mg) for 12 days, with or without an injection of 500 IU of equine chorionic gonadotropin (eCG) at sponge removal. We hypothesized that quantitative echotextural attributes of the follicles in ewes treated only with MAP would differ from those in MAP/eCG-treated ewes, reflecting the increased antral follicular growth and secretory function under eCG influence. Digital images of ovulatory follicles obtained at 0 and 24 h after MAP sponge removal and at 24 h before ovulation in the eCG-treated (five ewes, 13 follicles) and control (six ewes, 9 follicles) animals, were subjected to computerized analyses. The mean diameter of ovulatory follicles increased (p < 0.001) 24 h after eCG treatment. The mean pixel intensity and heterogeneity of the follicular antrum (p < 0.001), as well as mean pixel intensity of the follicular wall and perifollicular ovarian stroma (p < 0.05), were greater in eCG-treated animals compared with control ewes 24 h after sponge removal and at 24 h before ovulation. Mean serum concentrations of oestradiol-17beta tended to increase (p = 0.06) 24 h after eCG treatment and the eCG-treated ewes exceeded (p < 0.05) control animals in progesterone concentrations from days 9-15 after ovulation. Our results support the hypothesis that large antral follicles in eCG-treated ewes exhibit distinctive echotextural characteristics. Follicular image attributes in eCG-treated ewes appear to be indicative of the changes in follicular morphology and secretory activity caused by the administration of the exogenous gonadotropin, which has both FSH- and LH-like activities.
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Affiliation(s)
- X Liu
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Canada
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13
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D'Alessandro AG, Martemucci G, Taibi L. How the FSH/LH ratio and dose numbers in the p-FSH administration treatment regimen, and insemination schedule affect superovulatory response in ewes. Theriogenology 2005; 63:1764-74. [PMID: 15763116 DOI: 10.1016/j.theriogenology.2004.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2004] [Revised: 08/22/2004] [Accepted: 08/25/2004] [Indexed: 10/26/2022]
Abstract
We wished to evaluate the effects of FSH/LH ratio and number of doses of p-FSH during a superovulatory treatment on ovulation rate and embryo production (Experiment I). In Experiment II, we studied the efficacy of fertilization after various insemination schedules in superovulated donors. In Experiment I estrus was synchronized in 40 ewes (FGA, for 9 days plus PGF2alpha on Day 7) and the ewes were randomly assigned to four treatment groups as follows (n = 10 ewes each): Group A: four p-FSH doses with the FSH/LH ratio held constant (1.6); Group B: four p-FSH doses with the FSH/LH ratio decreasing (FSH/LH 1.6-1.0-0.6-0.3); Group C: eight p-FSH doses with the FSH/LH ratio held constant (1.6); Group D: eight p-FSH doses and FSH/LH ratio decreasing (1.6-1.6, 1.0-1.0, 0.6-0.6, 0.3-0.3). p-FSH administrations were performed twice daily 12 h apart. The ewes were mated at the onset of estrus and again after 12 and 24 h; then, one ram per four ewes was maintained with the ewes for two additional days. Ovarian response and embryo production were assessed on Day 7 after estrus. Experiment II. Three groups (n = 10 each) of superovulated ewes were inseminated as follows: Group M: mated at onset of estrus; Group AI: artificial insemination 30 h after onset of estrus; M + AI) mating at onset of estrus and intrauterine AI performed 30 h from estrus with fresh semen. Results of Experiment I showed that treatment (D) improved (P < 0.05) ovulatory response in comparison to Groups (C) and (A). The fertilization rate was lower (P < 0.01) in Group D) than Group (A). Also the proportion of transferable embryos was lower in Group (D) in comparison to all the other treatments (P < 0.01). Group A gave the best production of embryos (7.3/ewe; 89.0% transferable). In Experiment II, combined mating plus AI improved fertilization rate (80.3%) compared to both mating (P < 0.01) and AI (P < 0.02) alone.
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Affiliation(s)
- A G D'Alessandro
- Department of Progettazione e Gestione delle Risorse Agro-Zootecniche e Forestali-PRO.GE.SA., University of Bari, Via G. Amendola, 165/A, 70126 Bari, Italy.
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Barrett DMW, Bartlewski PM, Batista-Arteaga M, Symington A, Rawlings NC. Ultrasound and endocrine evaluation of the ovarian response to a single dose of 500 IU of eCG following a 12-day treatment with progestogen-releasing intravaginal sponges in the breeding and nonbreeding seasons in ewes. Theriogenology 2004; 61:311-27. [PMID: 14662131 DOI: 10.1016/s0093-691x(03)00215-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A standard dose of 500 IU of eCG is commonly given to progestogen pre-treated anestrous ewes for induction of estrus. Twelve seasonally anestrous and 12 cyclic Western White Face ewes were treated for 12 days with intravaginal sponges impregnated with medroxyprogesterone acetate (MAP). In trials in both the breeding and nonbreeding seasons, six randomly selected ewes were given 500 IU of eCG at sponge removal to determine the effects of low dose of eCG on ovarian antral follicular dynamics and ovulation. Ultrasound scanning and blood sampling were done daily. Treatment with eCG did not have marked effects on antral follicular growth. All ewes ovulated, except for five of six control anestrous ewes. Luteal structures and progesterone secretion were confirmed in all but the control anestrous ewes. In the breeding season, peak progesterone concentrations were greater (P<0.05) in eCG-treated compared to control ewes. Daily serum estradiol concentrations were greater in the periovulatory period in eCG-treated compared to control ewes (treatment-by-day interaction; P<0.05), particularly in anestrus. Progestogen-treated ewes ovulated follicles from several follicular waves, in contrast to ovulations of follicles from the final wave of the cycle in untreated, cyclic ewes. Anestrous ewes exhibited more frequent follicular waves and FSH peaks compared to cyclic ewes after a progestogen/eCG treatment. In conclusion, 500 IU of eCG given after 12 days of progestogen treatment had limited effects on the dynamics of ovarian follicular waves. However, eCG treatment increased serum concentrations of estradiol during the periovulatory period, particularly in anestrous ewes; this probably resulted in the synchronous estrus and ovulation in anestrous ewes.
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Affiliation(s)
- D M W Barrett
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4
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15
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Metabolism of progesterone to estrogens and androgens by individual follicles of the goat ovary. Small Rumin Res 2003. [DOI: 10.1016/s0921-4488(02)00278-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Blanco M, Simonetti L, Rivera O. Embryo production and progesterone profiles in ewes superovulated with different hormonal treatments. Small Rumin Res 2003. [DOI: 10.1016/s0921-4488(02)00245-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Riesenberg S, Meinecke-Tillmann S, Meinecke B. Estradiol-17beta and progesterone in the peripheral blood plasma of goats following superovulation with a single dose of pFSH, hMG or eCG. Small Rumin Res 2001; 40:73-82. [PMID: 11259878 DOI: 10.1016/s0921-4488(00)00212-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
During the breeding season, 42 adult German Improved Fawn nanny goats were superovulated with a single dose of pFSH, hMG or eCG at the end or a single application of pFSH 36h before the end of synchronization treatment using flugestone acetate (FGA). Plasma sampling was performed immediately before and 1h after gonadotrophin treatment, twice daily during pre-estrus and estrus and once daily during post-estrus in order to determine peripheral estradiol-17beta and progesterone levels. During that period, ovarian dynamics was followed by serial ultrasound scans (8h interval during pre-estrus and estrus and once daily during post-estrus). Estradiol-17beta profiles differed between the treatment groups exhibiting significantly positive correlations between the mean estradiol-17beta concentrations and the numbers of developing large and medium-sized follicles during estrus. The early bolus application of FSH 36h before the end of synchronization treatment induced an additional advanced estradiol-17beta peak during gestagen dominance. A sharp decrease of estradiol-17beta at the end of estrus seems to play a major role for normal luteal development. Progesterone profiles during the early luteal phase revealed high premature luteal regression. An early progesterone increase was accompanied by low premature regression rates.Although simple B-mode ultrasonography is suitable to follow follicular growth patterns and to determine the ovulation rate following different superovulation regimen endocrinological supervision is required in order to detect a premature corpus luteum insufficiency.
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Affiliation(s)
- S Riesenberg
- Department of Reproductive Medicine, School of Veterinary Medicine Hannover, Buenteweg 15, 30559, Hannover, Germany
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Riesenberg S, Meinecke-Tillmann S, Meinecke B. Ultrasonic study of follicular dynamics following superovulation in German Merino ewes. Theriogenology 2001; 55:847-65. [PMID: 11291909 DOI: 10.1016/s0093-691x(01)00448-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Ewes are commonly superovulated with a single dose of eCG or multiple doses of pFSH. It would be convenient and less expensive to use a single dose of FSH, but results of various trials have been controversial. We wished to investigate ovarian dynamics using ultrasonography after superovulation with a single dose of pFSH and hMG as compared with a single dose of eCG. Estrus was synchronized during the breeding season with fluorogestone acetate-containing intravaginal sponges in adult German Merino ewes (n = 38). They were superovulated with single doses of pFSH (17 mg; n = 10), hMG (600 IU FSH and 600 IU LH; n = 9) or eCG (1250 IU; n = 10) given at the time of sponge removal, or pFSH (17 mg; n = 9) given 36h before sponge removal. Follicular and luteal development were observed by ultrasonic scanning every 8 h from the gonadotrophin injection until the end of estrus, and then once daily until Day 6 after estrus. Jugular venous blood was collected starting immediately before and 1 h after superovulation treatment, then twice daily until the end of estrus and once daily for the following 7 days. Concentrations of estradiol-17beta (E2) and progesterone (P4) were measured in plasma. Differences in the follicular dynamics of the 4 superovulation groups were obvious. The functional duration of the pFSH action was estimated to last approximately 48 h, whereas eCG and hMG were active for up to 72 h. The diameter of the ovulatory follicles proved to be smaller than it was described for unstimulated ewes. Single applications of pFSH or hMG can induce a superovulatory response, although the post-estrus progesterone profile revealed a high premature luteal regression rate in the different superovulation groups. Premature corpus luteum regression could not be seen by ultrasonography at this early stage of the luteal phase, indicating that the technique may fail to detect these corpora lutea in an embryo transfer program. However, ultrasonography represents a suitable method to observe follicular dynamics following different superovulation regimens in sheep.
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Affiliation(s)
- S Riesenberg
- Department of Reproductive Medicine, School of Veterinary Medicine, Hannover, Germany
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Naqvi S, Gulyani R. Ovarian response and embryo recovery to different superovulatory regimens in Rambouillet ewes under semi-arid conditions. Small Rumin Res 1999. [DOI: 10.1016/s0921-4488(99)00045-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Joyce IM, Khalid M, Haresign W. Growth hormone priming as an adjunct treatment in superovulatory protocols in the ewe alters follicle development but has no effect on ovulation rate. Theriogenology 1998; 50:873-84. [PMID: 10734460 DOI: 10.1016/s0093-691x(98)00192-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
This study investigated the effect of FSH alone and rGH priming followed by FSH treatment on follicle populations, follicular fluid concentrations of components of the IGF system and steroids, and the ovulation rate in sheep. Estrus was synchronized with progestagen sponges. Ewes (n = 10/group) in Group 1 served as untreated controls, while those in Groups 2 to 5 received a standard superovulatory treatment of 1.1 mg i.m. oFSH twice daily for 4 d. In addition, ewes in Groups 3 and 5 were administered rGH (15 mg/d, i.m.) for the 7 d prior to FSH treatment. Groups 1, 2 and 3 were sacrificed just prior to the LH surge; Groups 4 and 5 were allowed to ovulate. Daily plasma samples were collected to monitor GH, IGF-1 and insulin levels. All follicles > or = 1.0 mm from Groups 1, 2 and 3 were counted, and follicular fluid from follicles > or = 2.5 mm was assayed for estradiol, testosterone, IGF-1 and IGFBPs. Compared with the control, treatment with rGH + FSH but not FSH alone increased (P < 0.001) plasma concentrations of GH, IGF-1 and insulin. The mean number of large-(> or = 4.5 mm) and medium-sized (2.5 to 4.0 mm) follicles was increased (P < 0.01), and the mean number of small (< or = 2.0 mm) follicles was decreased (P < 0.001) by FSH treatment. The mean number of medium-sized (2.5 to 4.0 mm) follicles was further increased (P < 0.05) by rGH priming. Estradiol concentration in medium but not in large estrogenic follicles was increased (P < 0.05) by rGH priming, whereas testosterone concentration in estrogenic follicles was not altered. Components of the IGF system in medium-sized estrogenic follicles were similar in all treatment groups; however, in large estrogenic follicles rGH increased IGF-1 concentrations (P < 0.05) and intensity of the 44-42 kDa IGFBP band (P < 0.01). Priming with rGH did not alter superovulatory responses. These results show that rGH priming, when used as an adjunct to FSH treatment in ewes, alters components of the IGF system in large estrogenic follicles and increases the number and physiological maturity of medium-sized follicles in the ovary; it does not however alter ovulation rate responses.
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Affiliation(s)
- I M Joyce
- School of Biological Sciences, University of Nottingham, Sutton Bonington, Leics, UK
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21
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Leyva V, Buckrell BC, Walton JS. Follicular activity and ovulation regulated by exogenous progestagen and PMSG in anestrous ewes. Theriogenology 1998; 50:377-93. [PMID: 10732133 DOI: 10.1016/s0093-691x(98)00147-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Follicular dynamics and ovulation were compared in 3 groups of anestrous ewes: those treated with medroxyprogesterone acetate (MAP) sponges for 12 d, then with 750 IU PMSG at the time of sponge removal (P4 + PMSG, n = 6), or PMSG alone (n = 6) and untreated controls (n = 6). Waves of follicular activity were observed in all the animals. In the P4 + PMSG treatment group, MAP priming permitted more ovulatory follicles (P < 0.001) to be recruited without changing follicle growth rate; MAP priming also delayed the time of ovulation (P < 0.001) and the time of the LH surge (P < 0.01), which allowed for an increase in the size of ovulatory follicles (P < 0.05). Ovulation also resulted in normal luteal function after P4 + PMSG (P < 0.01) but not after PMSG alone, since premature luteal regression occurred in 80% of the cases and was related to the presence of follicles > 4 mm when P4 levels were < 1 ng/mL on the day following ovulation. The results showed that MAP priming increased the ovulation rate by increasing the number of follicles that responded to PMSG.
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Affiliation(s)
- V Leyva
- Department of Animal and Poultry Science, University of Guelph, Ontario, Canada
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22
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FUKUI Y, OKADA M, ISHIDA N. Incidence of Premature Luteal Regression in Ewes Superovulated with a Single Injection of Follicle-Stimulating Hormone Combined with Equine Chorionic Gonadotropin. J Reprod Dev 1998. [DOI: 10.1262/jrd.44.407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yutaka FUKUI
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080, Japan
| | - Midori OKADA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080, Japan
| | - Naohisa ISHIDA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080, Japan
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23
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WATANABE H, MIYAMOTO A, OKADA M, ISHIDA N, KIMURA H, FUKUI Y. A Simple Superovulation Method of A Single Injection of Follicle-Stimulating Hormone Combined with Equine Chorionic Gonadotropin for Superovulation of Suffolk Ewes During the Breeding Season: I. Effects of Different Treatments on the Endocrine Profiles. J Reprod Dev 1998. [DOI: 10.1262/jrd.44.169] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hiroko WATANABE
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
| | - Akio MIYAMOTO
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
| | - Midori OKADA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
| | - Naohisa ISHIDA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
| | - Hidenori KIMURA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
| | - Yutaka FUKUI
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro-shi, Hokkaido 080-8555, Japan
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24
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Jabbour HN, Hayssen V, Bruford MW. Conservation of deer: contributions from molecular biology, evolutionary ecology, and reproductive physiology. J Zool (1987) 1997. [DOI: 10.1111/j.1469-7998.1997.tb02795.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Ratto MH, Gatica R, Correa JE. Timing of mating and ovarian response in llamas (Lama glama) treated with pFSH. Anim Reprod Sci 1997; 48:325-30. [PMID: 9452884 DOI: 10.1016/s0378-4320(97)00047-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The effect of the timing of mating on ovarian response in llamas was evaluated using 20 adult llamas weighing 90-120 kg which had been in oestrus for 5 days and were treated with 20 mg pFSH every 12 h for the following 5 days (total dose: 200 mg of FSH-NIH-P1). They were randomly allocated to Group A (N = 10) and mated immediately at the end of pFSH treatment or to Group B (n = 10) and mated 36 h after the end of pFSH treatment. Llamas of both groups were given hCG (750 iu, i.m.) immediately after mating. A second mating was allowed 12 h later. Ova and embryos were recovered by non-surgical uterine flushing 7 days after the first mating. Ovarian response was immediately evaluated afterwards via laparoscopy. The mean ovulation rate of 4.5 corpora lutea for Group A was significantly lower (P < 0.01) than the mean of 13.8 observed for Group B. The total ovarian response (number of corpora lutea + follicles > 10 mm) was also significantly higher (P < 0.01) in Group B than in Group A. Twenty-seven ova were recovered in each group, corresponding to 60% and 20% (P < 0.01) of the corpora lutea observed in Groups A and B, respectively; however, no significant difference (P > 0.05) in fertilisation rate was observed. The results show that pFSH induces superovulation in llamas treated during oestrus and that a 36-h interval between the end of FSH treatment and mating increases ovulation rate and the total ovarian response but does not affect the number of ova/embryos recovered.
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Affiliation(s)
- M H Ratto
- Animal Reproduction Institute, Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile
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26
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Boscos C, Vainas E, Kouskoura T, Samartzi F, Vafiadis D, Dellis S. Superovulatory Response of Chios and Friesian Ewes to Two FSH-P Dose Levels. Reprod Domest Anim 1997. [DOI: 10.1111/j.1439-0531.1997.tb01281.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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D'Alessandro A, Martemucci G, Colonna MA, Cafueri C, Toteda F. Some effects of adding p-LH in defined amounts to purified p-FSH to modify FSH/LH ratios during the superovulatory treatment of anestrous ewes. Anim Reprod Sci 1997; 47:91-8. [PMID: 9233508 DOI: 10.1016/s0378-4320(97)00003-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nonlactating Leccese ewes (n = 61) were used during seasonal anestrus to investigate the effects on ovarian response and embryo production of adding defined amounts of p-LH to purified p-FSH as well as decreasing the FSH/LH ratio during treatment. The ewes were synchronized with FGA-impregnated intravaginal pessaries for 9 days and prostaglandin F2 alpha (Cloprostenol) injected on the seventh day. They were divided into six treatment groups in a 3 x 2 factorial design: three amounts of purified p-LH (100, 50 or 25% equivalent to 525, 262 or 131 IU p-LH) x 2 regimen of p-FSH and p-LH administration (constant or decreasing FSH/LH ratio). Each ewe received a total of 525 IU p-FSH at a decreasing dose, twice daily over a 3-day period. Group I (n = 11), Group II (n = 10) and Group III (n = 10) were treated with p-FSH supplemented with p-LH at 100%, 50% and 25%, respectively, of p-FSH dose and a constant FSH/LH ratio throughout the treatment period. Group IV (n = 10), Group V (n = 10) and Group VI (n = 10) were treated with p-FSH supplemented with p-LH at 100%, 50% and 25%, respectively, of p-FSH dose but with a decreasing FSH/LH ratio over the 3 days of the treatment: 1.7-0.86-0.43 for Group IV; 3.4-1.7-0.86 for Group V; 6-3-1.5 for Group VI. Embryos were flushed surgically on Day 6 after estrus. The ovulation rate did not differ among the groups (8-12.8). Superovulation with 100% p-LH and decreasing the FSH/LH ratio (Group IV) resulted in: (i) the highest ova recovery (9.8 +/- 1.7), and this was significantly different (P < 0.05) from the 25% p-LH treated group (Group VI; 5.0 +/- 1.7), (ii) the highest fertilization rate (90.6 +/- 9.2%), with a significant (P < 0.01) difference compared with the constant ratio regimen (Group I; 62.6 +/- 8.3%); (iii) the highest transferable embryo yield (6.4 +/- 1.1), differing significantly (P < 0.01) from Group VI (2.2 +/- 1.1) and Group I (2.7 +/- 1.0). It is concluded that decreasing the amount of p-LH added to purified p-FSH did not improve the superovulatory response of ewes during the anestrous period. Transferable embryo production was significantly improved when ewes were treated with p-LH equivalent to 100% p-FSH, with the FSH/LH ratio decreasing during treatment.
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Affiliation(s)
- A D'Alessandro
- Dipartimento di Produzione Animale, Università degli Studi di Bari, Italy
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28
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Willard ST, Hughes DM, Bringans M, Sasser RG, White DR, Jaques JT, Godfrey RW, Welsh TH, Randel RD. Artificial insemination, hybridization and pregnancy detection in sika deer (). Theriogenology 1996; 46:779-89. [PMID: 16727942 DOI: 10.1016/s0093-691x(96)00236-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/1995] [Accepted: 04/16/1996] [Indexed: 11/26/2022]
Abstract
Artificial insemination (AI) was performed on sika hinds (Cervus nippon ) receiving various dosages of pregnant mare serum gonadotropin (PMSG; Year 1: 0, 50 and 100 IU; Year 2: 100 and 150 IU) and using semen collected from elk and 1 2 elk x 1 2 sika stags. The time from synchronization device removal (CIDR vs norgestomet) to estrus was determined through observations of mounting activity. Methods for pregnancy detection, serum progesterone (P4), estrone sulfate (E1S), pregnancy-specific protein B (PSPB) and ultrasonography, following AI (Year 1: AI, Days 28 and 48 after AI; Year 2: AI, Days 42, 53 and 100 after AI) and a 90-d natural breeding season were investigated. From available production data, body weights were compared among sika and 1 4 elk x 3 4 sika hybrids relative to age. Pregnancy rates tended (P < 0.10) to differ relative to PMSG treatment and sire; administration of 0 IU PMSG resulted in fewer hinds becoming pregnant to AI than 50 or 100 IU of PMSG. Hinds receiving 100 IU of PMSG had higher (P < 0.05) pregnancy rates than hinds receiving 150 IU PMSG. Time to standing estrus did not differ (P > 0.10) between the CIDR and norgestomet groups. Pregnancy rates 50 d after a 90-d breeding season were similar (P > 0.10) between ultrasound (70.9%) and PSPB (61.6%). Serum P4 after 90 d in breeding groups and 50 d after stag removal were higher (P < 0.05) for pregnant than open hinds. Pregnancy rates (Year 1) 48 d after AI were similar (P > 0.10) between ultrasound (49.0%) and PSPB (37.3%). Serum P4 28 and 48 d after AI were higher (P < 0.05) for pregnant than open hinds. Serum E1S was higher (P < 0.01) for pregnant than open hinds 48 d after AI. Pregnancy rates (Year 2) 100 d after AI did not differ (P > 0.10) between ultrasound and PSPB (66.7%). Serum P4 was higher (P < 0.03) in pregnant than open hinds at 42, 53 and 100 d after AI. At 100 d after AI, pregnant hinds had higher (P < 0.002) serum E1S than open hinds. At 6 to 8 and 11 to 13 mo of age, 1 4 elk x 3 4 sika males tended (P < 0.08) to be heavier than sika males, while 1 4 elk x 3 4 sika females were heavier (P < 0.05) than sika females at all ages. In summary, this study documents the use of AI and methods for pregnancy detection in sika hinds as well as preliminary information regarding the production of elk-x-sika hybrids.
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Affiliation(s)
- S T Willard
- Texas Agricultural Experiment Station, Overton, TX 75684, USA
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29
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YAMADA A, KAWANA M, TAMURA Y, MIYAMOTO A, FUKUI Y. Effect of Single or Multiple Injection of Follicle Stimulating Hormone Combined with Pregnant Mare Serum Gonadotropin on Superovulatory Response, and Normal and Freezable Embryos in Ewes. J Reprod Dev 1996. [DOI: 10.1262/jrd.42.81] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Aki YAMADA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, 080, Japan
| | - Mayuko KAWANA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, 080, Japan
| | - Yoshio TAMURA
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, 080, Japan
| | - Akio MIYAMOTO
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, 080, Japan
| | - Yutaka FUKUI
- Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine, 080, Japan
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31
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Samartzi F, Boscos C, Vainas E, Tsakalof P. Superovulatory response of Chios sheep to PMSG during spring and autumn. Anim Reprod Sci 1995. [DOI: 10.1016/0378-4320(95)01380-i] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Ledda S, Naitana S, Loi P, Dattena M, Gallus M, Branca A, Cappai P. Embryo recovery from superovulated mouflons (Ovis gmelini musimon) and viability after transfer into domestic sheep. Anim Reprod Sci 1995. [DOI: 10.1016/0378-4320(95)01391-c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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33
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Bainbridge D, Chapple D, Loudon A, Jabbour H. Immunoneutralization with a monoclonal antibody attenuates the superstimulatory effects of PMSG on endocrine and ovarian responses in red deer (). Theriogenology 1995. [DOI: 10.1016/0093-691x(95)00118-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Asher G, Jabbour H, Thompson J, Tervit H, Morrow C. Superovulation of farmed red deer (Cervus elaphus) and fallow deer (Dama dama) : Incidence of ovulation and changes in plasma hormone concentrations during the pre-ovulatory period in relation to ova recovery and fertilisation. Anim Reprod Sci 1995. [DOI: 10.1016/0378-4320(94)01351-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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35
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Dattena M, Vespignani S, Branca A, Gallus M, Ledda S, Naitana S, Cappai P. Superovulatory response and quality of embryos recovered from anestrus ewes after a single injection of porcine FSH dissolved in polyvinylpyrrolidone. Theriogenology 1994; 42:235-9. [PMID: 16727530 DOI: 10.1016/0093-691x(94)90267-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/1993] [Accepted: 05/12/1994] [Indexed: 10/26/2022]
Abstract
The effects of a single injection of porcine FSH (pFSH) administered in long acting vehicle on the superovulatory response of milk (Sarda breed) sheep were determined during the anestrous season. The sheep (n=42), synchronized with intravaginal sponges (40 mg fluorogestone acetate -FGA- for 14 d) were submitted 24 h before sponge removal to three different superovulatory treatments. Group 1 (n=16) was treated with a single intramuscular (im) injection of 16 mg of pFHS dissolved in 30 % polyvinylpyrrolidone (PVP); Group 2 (n=12) was injected im with 6, 5, 3 and 2 mg of pFSH every 12 h over 2 d; Group 3 (n=14) was given 800 IU of PMSG and 12 mg of pFSH. All sheep were mated with a fertile ram. Embryos were recovered surgically at Day 7 of sponge removal and graded for the quality according to their morphology. The percentage of good quality embryos recovered was 84% in Group 1, 68% in Group 2 and 77% in Group 3. Data for the onset of estrus, number of corpora lutea (CL), number of unovulated follicles, embryo recovery rate, embryo quality and fertilization rate were recorded for the 3 groups. The onset of estrus, number of CL, number of unovulated follicles, fertilization rate and number of good quality embryos did not differ significantly among the 3 groups. The embryo recovery rate was significantly lower in the group treated with PMSG-FSH (Group 3) than in the 2 other groups. It is concluded that during the anestrous season a single injection im of pFSH results on average in a superovulatory response as good as the more traditional treatments like multiple injections of pFSH and PMSG-pFSH combined.
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Affiliation(s)
- M Dattena
- Istituto Zootecnico e Caseario per la Sardegna, Olmedo, Italy
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36
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Meinecke-Tillmann S, Lewalski H, Meineke B. Superovulationsinduktion bei Merinolandschafen nach einmaliger oder multipler FSH-Applikation. Reprod Domest Anim 1993. [DOI: 10.1111/j.1439-0531.1993.tb01020.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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