Data/hora: 04/06/2024 13:00:36

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 19/10/2020
Data da última atualização: | 25/11/2021
Autoria: | FIGUEIRA, L. M.; ALVES, N. G.; MAIA, A. L. R. e S.; SOUZA-FABJAN, J. M. G.; BATISTA, R. I. T. P.; ARRAIS, A. M.; LIMA, R. R.; OLIVEIRA, M. E. F.; FONSECA, J. F. da.
Afiliação: | LUCAS MACHADO FIGUEIRA; NADJA GOMES ALVES; ANA LUCIA ROSA E SILVA MAIA; JOANNA MARIA GONÇALVES SOUZA-FABJAN; RIBRIO IVAN TAVARES PEREIRA BATISTA; ALINE MATOS ARRAIS; RENATO RIBEIRO LIMA; MARIA EMILIA FRANCO OLIVEIRA; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | In vivo embryo production and recovery in lacaune ewes after imposing a superovulation treatment regimen is related to pFSH dose.
Ano de publicação: | 2020
Fonte/Imprenta: | Animal Reproduction Science, v. 223, e106625, Dec. 2020.
DOI: | https://doi.org/10.1016/j.anireprosci.2020.106625
Idioma: | Inglês
Conteúdo: | Abstract: 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.
Palavras-Chave: | Dosage effects; MOET; Superovulated females; Transcervical; Uterine flushing.
Thesaurus Nal: | Corpus luteum; Dairy sheep; Genetic improvement; Gonadotropins.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39652-1) - UPC - AP - DD -  -  -  - DIS