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Brochado C, Duran BJ, Kieffer JD, Pinczak A, Menchaca A, Garcia-Guerra A. Reduced embryo yield obtained from superstimulated ewes with low circulating AMH concentration is improved by lengthening the FSH treatment. Theriogenology 2024; 218:79-88. [PMID: 38301510 DOI: 10.1016/j.theriogenology.2024.01.024] [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: 09/20/2023] [Revised: 01/17/2024] [Accepted: 01/23/2024] [Indexed: 02/03/2024]
Abstract
The aim of the present study was to evaluate: 1) the association between AMH, AFC, superovulatory response and embryo yield in sheep; and 2) the effect of FSH treatment length during superstimulation of the first follicular wave on ovarian response and embryo yield, particularly in ewes with low and high AMH. The experiment was performed on 63 Polled Dorset ewes that received an ovarian superstimulatory treatment during the first follicular wave (Day 0 protocol). Ewes were administered a total dose of 240 mg of FSH distributed in six (6-dose regimen, n = 30) or eight (8-dose regimen, n = 33) decreasing doses administered 12 h apart. On Day -9 (random stage of the estrous cycle) and Day 0 (day of the first FSH dose) ovarian ultrasonography was performed and blood samples were collected for AFC and AMH determinations, respectively. A weak positive correlation between AMH and small AFC (follicles <4 mm) was observed (r = 0.23; P = 0.07), and AMH concentration was positively correlated (r = 0.29; P < 0.05) with the number of corpora lutea (CL) determined at embryo collection (i.e., 6 d after insemination). The length of FSH treatment tended (P = 0.06) to affect the ovarian response, such that the number of CL was greater in 8-dose than 6-dose treated ewes, while no differences (P > 0.10) in embryo yield outcomes were observed. For further analysis, ewes were classified into low (<7 ng/mL) and high (>10 ng/mL) serum AMH. In high AMH ewes, there were no differences (P > 0.05) in the number of CL nor embryo yield between the 6-dose and 8-dose treatment (e.g., 7.8 ± 2.4 and 8.3 ± 2.5 transferable embryos, respectively; P = 0.92). Conversely, for low AMH ewes, fertilized ova and embryo yield were greater (P ≤ 0.05) for ewes receiving the 8-dose than the 6-dose superstimulatory treatment (e.g., 8.4 ± 2.8 vs. 2.7 ± 0.9 transferable embryos, respectively, P ≤ 0.05). In conclusion, embryo production in poor responding ewes with low low circulating AMH is improved by extending the superstimulatory treatment length from 6 to 8 FSH doses.
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Affiliation(s)
| | - B J Duran
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
| | - J D Kieffer
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
| | - A Pinczak
- Fundación IRAUy, Montevideo, Uruguay
| | - A Menchaca
- Fundación IRAUy, Montevideo, Uruguay; Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), Montevideo, Uruguay.
| | - A Garcia-Guerra
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA.
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2
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Progestogen supplementation during superovulation leads to higher embryo viability and TGFB1 gene expression in sheep. Anim Reprod Sci 2022; 238:106938. [DOI: 10.1016/j.anireprosci.2022.106938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 12/15/2021] [Accepted: 01/30/2022] [Indexed: 11/22/2022]
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3
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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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Souza-Fabjan JMG, Batista RITP, Correia LFL, Paramio MT, Fonseca JF, Freitas VJF, Mermillod P. In vitro production of small ruminant embryos: latest improvements and further research. Reprod Fertil Dev 2021; 33:31-54. [PMID: 38769678 DOI: 10.1071/rd20206] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024] Open
Abstract
This review presents the latest advances in and main obstacles to the application of invitro embryo production (IVEP) systems in small ruminants. This biotechnology is an extremely important tool for genetic improvement for livestock and is essential for the establishment of other biotechnologies, such as cloning and transgenesis. At present, the IVEP market is almost non-existent for small ruminants, in contrast with the trends observed in cattle. This is probably related to the lower added value of small ruminants, lower commercial demand and fewer qualified professionals interested in this area. Moreover, there are fewer research groups working on small ruminant IVEP than those working with cattle and pigs. The heterogeneity of oocytes collected from growing follicles in live females or from ovaries collected from abattoirs remains a challenge for IVEP dissemination in goats and sheep. Of note, although the logistics of oocyte collection from live small ruminant females are more complex than in the bovine, in general the IVEP outcomes, in terms of blastocyst production, are similar. We anticipate that after appropriate training and repeatable results, the commercial demand for small ruminant invitro -produced embryos may increase.
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Affiliation(s)
- Joanna M G Souza-Fabjan
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Niterói-RJ, CEP 24230-340, Brazil; and Corresponding author
| | - Ribrio I T P Batista
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Niterói-RJ, CEP 24230-340, Brazil
| | - Lucas F L Correia
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Niterói-RJ, CEP 24230-340, Brazil
| | - Maria Teresa Paramio
- Departament de Ciencia Animal i dels Aliments, Facultat de Veterinaria, Universitat Autonoma de Barcelona, 08193 Cerdanyola del Valles, Barcelona, Spain
| | - Jeferson F Fonseca
- Embrapa Caprinos e Ovinos, Rodovia MG 133, km 42, Campo Experimental Coronel Pacheco, Coronel Pacheco-MG, CEP 36155-000, Brazil
| | - Vicente J F Freitas
- Laboratório de Fisiologia e Controle da Reprodução, Universidade Estadual do Ceará, Fortaleza-CE, CEP 60714-903, Brazil
| | - Pascal Mermillod
- Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), UMR7247, Physiologie de la Reproduction et des Comportements, Nouzilly, France
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5
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Bragança GM, Batista RITP, Souza-Fabjan JMG, Alfradique VAP, Arashiro EKN, Pinto PHN, Santos JDR, Camargo LSA, Menchaca A, da Fonseca JF, Brandão FZ. Exogenous progestogens differentially alter gene expression of immature cumulus-oocyte complexes in sheep. Domest Anim Endocrinol 2021; 74:106518. [PMID: 32711283 DOI: 10.1016/j.domaniend.2020.106518] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 06/04/2020] [Accepted: 06/24/2020] [Indexed: 11/29/2022]
Abstract
This study evaluated the role of progesterone (P4) and medroxyprogesterone acetate (MAP) on the molecular status of immature cumulus-oocyte complexes (COCs) and the implications for oocyte quality in sheep. The number of viable COCs per ewe and the rate of COCs screened for developmental competence by brilliant cresyl blue positive (BCB+) were similar (P > 0.05), respectively, across treatments (P4: 7.7 ± 0.7 and 4.7 ± 1.2; MAP: 5.7 ± 1.0 and 3.5 ± 2.3; and control: 5.7 ± 1.1 and 3.6 ± 2.4). The COCs' gene expression was altered by exogenous progestogens compared with the control group: markers of steroidogenic pathway (FSH receptor [FSHr], LH receptor [LHr], and estradiol receptor α) and of quality (zygote arrest 1, growth differentiation factor 9, and B-cell lymphoma 2) were in abundance in P4 (P < 0.05). In addition, reelin protein (RELN) was downregulated, and Bcl-2 was upregulated in MAP (P < 0.05). In the P4 vs MAP comparison, FSHr, LHr, and RELN genes were upregulated (P < 0.05) in the P4 group. In conclusion, P4 and MAP promoted dissimilar effects on transcriptome profiling of immature BCB-selected COCs, possibly due to the differences in the chemical structure of progestogens and concentrations of serum P4. Exogenous P4 impacted positively on the profile of genes related to oocyte quality.
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Affiliation(s)
- G M Bragança
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil.
| | - R I T P Batista
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - J M G Souza-Fabjan
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - V A P Alfradique
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - E K N Arashiro
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - P H N Pinto
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - J D R Santos
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
| | - L S A Camargo
- Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610, Juiz de Fora, Minas Gerais 36038-330, Brazil
| | - A Menchaca
- Fundacion IRAUy, Cno. Cruz del Sur 2250, Montevideo 12200, Uruguay
| | - J F da Fonseca
- Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, km 04, CP 145, Sobral, Ceará 62010-970, Brazil
| | - F Z Brandão
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro 24320-340, Brazil
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6
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Bragança GM, Souza-Fabjan JMG, Ribeiro LS, Brair VL, Côrtes LR, Souza CV, Batista RITP, Fonseca JF, Menchaca A, Brandão FZ. Exogenous progestogen does not affect first-wave follicle populations and oocyte quality during ovarian stimulation with FSH in sheep. Domest Anim Endocrinol 2020; 72:106369. [PMID: 31445776 DOI: 10.1016/j.domaniend.2019.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 05/19/2019] [Accepted: 06/04/2019] [Indexed: 11/20/2022]
Abstract
The effect of short-term administration of medroxyprogesterone acetate (MPA) or natural progesterone (P4) during ovarian stimulation with FSH on oocyte recovery was investigated in Santa Inês ewes. Ewes were treated with an intravaginal sponge containing MPA for 6 d; GnRH was applied 36 h after sponge removal and FSH was given in 3 injections (40, 24, and 16 mg, respectively) every 12 h after (D0, approximate ovulation time). At the first FSH dose, the ewes received either a new MPA sponge (n = 10) or a controlled device for internal release impregnated with P4 (n = 10) or did not receive any device (n = 10). Ovarian dynamics were assessed every 12 h by transrectal ultrasonography from D-3 to D2. Oocytes were recovered by laparoscopic ovum pick-up (LOPU) on D2 and graded by morphologic quality. The number of small, medium, and large follicles at D0 and D2 (ultrasound examinations), number of both follicles aspirated and oocytes recovered at LOPU, recovery rate, and oocyte grade did not differ (P > 0.05) among treatments. Thus, the short-term use of MPA or P4 during ovarian stimulation did not affect the first-wave follicle population or morphologic quality of oocytes. We would suggest that, in this protocol, the use of exogenous progestin is unnecessary.
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Affiliation(s)
- G M Bragança
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil.
| | - J M G Souza-Fabjan
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - L S Ribeiro
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - V L Brair
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - L R Côrtes
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - C V Souza
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - R I T P Batista
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
| | - J F Fonseca
- Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, km 04, CP 145, Sobral, Ceará CEP 62010-970, Brazil
| | - A Menchaca
- Fundacion IRAUy, Cno. Cruz del Sur, 2250 CP, Montevideo 12200, Uruguay
| | - F Z Brandão
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, Niterói, Rio de Janeiro CEP 24320-340, Brazil
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7
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Figueira LM, Alves NG, Maia ALRES, Souza-Fabjan JMGD, Batista RITP, Morais MCDC, Lima RRD, Oliveira MEF, Fonseca JFD. Embryo yield and quality are associated with progestogen treatment during superovulation protocol in lactating Lacaune ewes. Theriogenology 2020; 155:132-138. [PMID: 32673848 DOI: 10.1016/j.theriogenology.2020.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/06/2020] [Accepted: 06/07/2020] [Indexed: 10/24/2022]
Abstract
This study assessed the effect of progestogen treatment length on ovarian parameters and embryo yield in superovulated Lacaune ewes collected by nonsurgical embryo recovery. Twenty-three lactating ewes were superovulated 30 d apart using a cross-over design. All ewes received 60 mg of MAP intravaginal sponges for 6 (G-6 group) or 9 (G-9 group) d. A total dose of 133 mg pFSH was given in six decreasing doses (twice a day) starting at 60 h before device removal. Ultrasound examination of the ovaries was performed at the first pFSH injection and one day before embryo recovery, which was performed 6-7 d after the onset of estrus. Embryo recovery was conducted only in ewes that expressed estrus and were mated. There was no difference (P > 0.05) in the total number of follicles between G-6 (15.7 ± 1.0) and G-9 (15.6 ± 0.8) at the time of the first pFSH treatment. The percentage of responding donors with ≥3 corpora lutea (CL; 78.2% [18/23] vs 69.5% [16/23]), mean (±SEM) CL number (7.0 ± 1.2 vs 8.1 ± 1.6), transcervical passage rate (94.4% [17/18] vs 83.3% [15/18], and ova/embryo recovery rate (54.5% [60/110] vs 68.0% [83/122]) were not different (P > 0.05) between the G-6 and G-9 groups. However, the mean number of viable embryos was lower (P < 0.05) in the G-6 group (1.8 ± 0.7) than in the G-9 group. (3.5 ± 1.1). In conclusion, treatment with an intravaginal MAP sponge for 9 d during a superovulation protocol is beneficial for viable embryo yield in Lacaune ewes out of the breeding season.
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Affiliation(s)
- Lucas Machado Figueira
- Universidade Federal de Lavras - Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-900, Lavras, MG, Brazil; Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Vital Brazil, CEP 24220-000, Niterói, RJ, Brazil
| | - Nadja Gomes Alves
- Universidade Federal de Lavras - Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-900, Lavras, MG, Brazil.
| | - Ana Lucia Rosa E Silva Maia
- Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Vital Brazil, CEP 24220-000, Niterói, RJ, Brazil
| | | | | | - Maria Clara da Cruz Morais
- Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Vital Brazil, CEP 24220-000, Niterói, RJ, Brazil
| | - Renato Ribeiro de Lima
- Universidade Federal de Lavras - Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-900, Lavras, MG, Brazil
| | - Maria Emilia Franco Oliveira
- Universidade Estadual Paulista "Júlio de Mesquita Filho, Via Prof. Paulo Donato Castellane s/n, CEP 14884-900, Jaboticabal, SP, Brazil
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8
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Alves JPM, Fernandes CCL, Rossetto R, Silva CPD, Galvão ITOM, Bertolini M, Rondina D. Impact of short nutrient stimuli with different energy source on follicle dynamics and quality of oocyte from hormonally stimulated goats. Reprod Domest Anim 2019; 54:1206-1216. [PMID: 31240745 DOI: 10.1111/rda.13500] [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: 05/23/2019] [Accepted: 06/19/2019] [Indexed: 12/27/2022]
Abstract
The aim of this study was to verify the effect of the energy source for a short-term diet supplementation on follicular dynamics, ovarian response and oocyte recovery in goats. Thirty Anglo Nubian crossbred does received a diet for 4 weeks to satisfy the nutritional requirements of breeding for adult non-dairy goats. Seven days prior to oocyte recovery (OR), a group of does (n = 10) was supplemented with ground full-fat linseed in the diet (Diet A), whereas a second group of does (n = 10) received crude glycerine in the diet (Diet B). The total mixed ration (TMR) diet was maintained as the Control Diet (n = 10). All animals were oestrous-synchronized by the use of a progesterone insert for 12 days prior to OR. Follicles were stimulated by using pFSH (five 40-mg/ml doses) during the supplementation time. At OR, follicles were counted and recovered oocytes were classified as viable or degenerated. Follicular dynamics was monitored by ultrasonography, and plasma glucose, cholesterol and triglyceride levels were measured during supplementation. Glucose was higher in Diet B and cholesterol in Diet A. Diet B had a lower proportion of small (<3 mm) and large follicles (≥3 mm; p = 0.01). The follicular growth rate was higher in Diet A (p < 0.01), with follicles emerging in the 5th day of supplementation. No differences were observed for follicles counted and oocytes recovered. Thus, the type of energy source supplemented for a short term was capable to alter the follicular dynamics, without affecting the proportion of morphologically viable oocytes upon recovery.
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Affiliation(s)
| | | | - Rafael Rossetto
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Brazil
| | | | | | - Marcelo Bertolini
- School of Veterinary Medicine, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Davide Rondina
- School of Veterinary Medicine, Ceará State University (UECE), Fortaleza, Brazil
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9
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Aller JF, Abalos MC, Acuña F, Cancino AK. Plasma steroid profiles and ovarian response in llamas treated with eCG for superovulation combined with exogenous progesterone during early luteal phase. Anim Reprod Sci 2019; 208:106108. [PMID: 31405462 DOI: 10.1016/j.anireprosci.2019.106108] [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: 03/13/2019] [Revised: 06/03/2019] [Accepted: 06/24/2019] [Indexed: 11/29/2022]
Abstract
The objective of this study was to evaluate the effects of plasma progesterone (P4) concentrations during eCG-ovarian follicular superstimulatory treatment performed in early luteal phase and estradiol concentrations during peri-ovulatory period on ovarian response, number and embryo quality. On Day -2, females (n = 75) having a follicle ≥7 mm were treated with GnRH to induce ovulation. On Day 0, females that had ovulations (n = 54) were treated with 1000 IU eCG and were assigned to one of two treatments: (1) intravaginal device (ID) containing 0.5 g P4 (P4 group) and (2) no ID (Control group). On Day 5, females were administered PGF2α and the ID was removed. On Day 7 and 8, females were mated and embryo recovery was performed 7 or 8 days later. Blood samples were collected from Day 0 to 9. Number (± SD) of follicles ≥7 mm on day of mating was greater (P = 0.04) in the control (9.7 ± 4.2) than P4-treated (6.7 ± 4.9) group; number of corpora lutea did not differ (5.5 ± 3.1 and 5.2 ± 3.4 respectively). Ovulation rate was greater (P < 0.01) in the P4-group (77.4%; 130/168) than control group (53.3%; 135/253). Number of embryos with an excellent grade (grade 1) tended to be greater (P = 0.07) in the P4-group (82.4%; 42/51) than control group (65.4%; 36/55). It was concluded that supplementation with exogenous P4 during eCG treatment in early luteal phase inhibits excessive follicular growth, increases ovulation rate and improves embryo quality.
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Affiliation(s)
- Juan F Aller
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Balcarce, 7620, Balcarce, Argentina.
| | - Marcos C Abalos
- INTA, Estación Experimental Agropecuaria Abra Pampa, Argentina
| | - Francisco Acuña
- INTA, Estación Experimental Agropecuaria Abra Pampa, Argentina
| | - Andrea K Cancino
- INTA, Estación Experimental Agropecuaria Bariloche, 8400, Bariloche, Argentina
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10
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Menchaca A, Cuadro F, Dos Santos-Neto PC, Bosolasco D, Barrera N, de Brun V, Crispo M. Oocyte developmental competence is improved by relatively greater circulating progesterone concentrations during preovulatory follicular growth. Anim Reprod Sci 2018; 195:321-328. [PMID: 31262405 DOI: 10.1016/j.anireprosci.2018.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/31/2018] [Accepted: 06/21/2018] [Indexed: 01/28/2023]
Abstract
This study evaluated the effect of progesterone priming during follicular growth on oocyte competence to undergo oocyte cleavage and embryo development in sheep. Two experiments were performed on a total of 195 females that either received or did not receive a progesterone treatment (CIDR-type device) during the first follicular wave, beginning soon after ovulation (i.e., Day 0 of the experiment). On Day 3, the follicular population and oocyte quality (Experiment 1 and 2) and the competence of oocytes for cleavage and embryo development (Experiment 2) were evaluated after laparoscopic ovum pickup (LOPU) and in vitro fertilization. In Experiment 1, in a 2 × 2 factorial study the progesterone priming treatment (treated or not) was or was not associated with a single dose of FSH in a slow-release hyaluronic acid preparation given on Day 0. The follicular population on Day 3 and the number and morphology of recovered cumulus oocyte complexes (COCs) were not affected by the progesterone treatment (P = NS) but were improved by the FSH administration (P < 0.05). An interaction between both treatments was observed (P < 0.05), with more desirable outcome with the females that received both the progesterone and the FSH treatments. In Experiment 2, half of the females received the exogenous progesterone priming, and all females received FSH on Day 0. After follicular aspiration on Day 3, the cleavage rate and the embryo development rate following in vitro fertilization and culture were greater in those females that received the progesterone treatment (P < 0.05). In conclusion, these studies provide evidence that progesterone treatment during follicular growth affects oocyte competence, with the greater progesterone concentrations enhancing the oocyte's capacity to undergo cleavage and embryo development.
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Affiliation(s)
- A Menchaca
- Instituto de Reproducción Animal Uruguay, Fundacion IRAUy, Cruz del Sur 2250, Montevideo, Uruguay.
| | - F Cuadro
- Instituto de Reproducción Animal Uruguay, Fundacion IRAUy, Cruz del Sur 2250, Montevideo, Uruguay
| | - P C Dos Santos-Neto
- Instituto de Reproducción Animal Uruguay, Fundacion IRAUy, Cruz del Sur 2250, Montevideo, Uruguay
| | - D Bosolasco
- Instituto de Reproducción Animal Uruguay, Fundacion IRAUy, Cruz del Sur 2250, Montevideo, Uruguay
| | - N Barrera
- Instituto de Reproducción Animal Uruguay, Fundacion IRAUy, Cruz del Sur 2250, Montevideo, Uruguay
| | - V de Brun
- Laboratorio de Técnicas Nucleares, Facultad de Veterinaria, Universidad de la República, Av. Lasplaces, 1550, Montevideo, Uruguay
| | - M Crispo
- Unidad de Animales Transgénicos y de Experimentación, Institut Pasteur de Montevideo, Mataojo, 2020, Montevideo, Uruguay
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