In vivo embryo production and recovery in lacaune ewes after imposing a superovulation treatment regimen is related to pFSH dose
| Autor: | Nadja Gomes Alves, Joanna Maria Gonçalves Souza-Fabjan, Renato Ribeiro de Lima, A. L. R. e S. Maia, Maria Emilia Franco Oliveira, Ribrio Ivan Tavares Pereira Batista, Jeferson Ferreira da Fonseca, Aline Matos Arrais, L. M. Figueira |
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| Přispěvatelé: | Universidade Federal de Lavras (UFLA), Universidade Federal Fluminense (UFF), Univ Fed Rural Rio de Janeiro, Universidade Estadual Paulista (Unesp), Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Estrous Cycle
Superovulation Biology Andrology Endocrinology Food Animals Recovery rate Device removal In vivo Corpus Luteum Pregnancy Follicular phase Dairy sheep Animals Cross-Over Studies Sheep Dose-Response Relationship Drug Treatment regimen Transcervical Embryo General Medicine Uterine flushing Antral follicle MOET Animal Science and Zoology Female Follicle Stimulating Hormone Gonadotropins |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2021-06-25T11:44:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01 Embrapa Goats and Sheep Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) This study was conducted to assess effects of different doses of pFSH on follicular recruitment, superovulatory response, ova/embryo recovery, and embryo yield in lactating ewes. Ewes (n = 24) had a superovulation treatment regimen imposed. All ewes were implanted with a progesterone intravaginal device for 9 d, and administered either 100 (G-100) or 200 (G-200) mg pFSH, proportioned into six doses administered at 12-h intervals, starting 60 h before device removal. At 7 days subsequent to progesterone device removal, there were non-surgical embryo recoveries (NSER) from ewes having three or more corpora lutea. At the time of the first pFSH injection, number of antral follicles were similar (P < 0.05) between ewes in the G-100 and G-200 group, however, there were more 3.1-4.0 mm follicles in ewes of the G-200 than G-100 group at the time of the second pFSH administration. Estrous response and CL number were less (P < 0.05) in ewes of the G-100 (66.7 % and 2.6 +/- 0.7) than G-200 (91.7 % and 11.6 +/- 1.2) group. There were embryo collections from 100 % and 90.9 % of ewes in the G-100 and G-200 groups, respectively (P > 0.05). Viable embryo numbers and ova/embryo recovery rate were greater (P < 0.05) in ewes of the G-200 (6.9 +/- 1.1 and 67.8 %) than G-100 (1.0 +/- 0.5 and 27.6 %) group. A dose of 200 mg pFSH was more effective in inducing a superovulatory response and embryo yield after NSER in ewes, however, the 100 mg dose was insufficient for these purposes. Univ Fed Lavras, Av Doutor Sylvio Menicucci 1001, BR-37200900 Lavras, MG, Brazil Univ Fed Fluminense, Rua Vital Brazil Filho 6, BR-24230340 Niteroi, RJ, Brazil Univ Fed Rural Rio de Janeiro, Rodovia BR 465,Km 07 S-N, BR-23890000 Seropedica, RJ, Brazil Univ Estadual Paulista, Via Acesso Prof Paulo Donato Castelane S-N, BR-14884900 Jaboticabal, SP, Brazil Embrapa Caprinos & Ovinos, Estr Sobral Groairas,Km 4,CP D10, BR-62011000 Sobral, CE, Brazil Univ Estadual Paulista, Via Acesso Prof Paulo Donato Castelane S-N, BR-14884900 Jaboticabal, SP, Brazil Embrapa Goats and Sheep: Superov 22.13.06.026.00.03/22.13.06.026.00.04 FAPEMIG: CVZ-PPM 00201-17 CAPES: 001 |
| Databáze: | OpenAIRE |
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