Data/hora: 05/06/2024 04:42:27

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 28/04/2020
Data da última atualização: | 28/04/2020
Autoria: | OLIVEIRA, M. E. F.; ZAMBRINI, F. N.; SOUZA-FABJAN, J. M. G.; BARTLEWSKI, P. M.; GUIMARÃES, J. D.; BRANDÃO, F. Z.; FONSECA, J. F. da.
Afiliação: | São Paulo State University (USP) - Jaboticabal, SP, Brazil; Viçosa Federal University (UFV) - Viçosa, MG, Brazil; JOANNA MARIA GONCALVES SOUZA-FABJAN, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Ontario Veterinary College, University of Guelph - Canada; Viçosa Federal University (UFV) - Viçosa, MG, Brazil; Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Repeated trans-cervical embryo recoveries in Santa inês ewes subjected to short- or long-term superovulatory treatment regimens.
Ano de publicação: | 2020
Fonte/Imprenta: | Animal Reproduction Science, v. 2017, article 106469 Jun. 2020.
DOI: | https://doi.org/10.1016/j.anireprosci.2020.106469
Idioma: | Inglês
Conteúdo: | Abstract: Outcomes of short- (6.5 days) and long-term (14.5 days) estrous synchronization for 6.5 d (G-6.5d) or 14.5 d (G-14.5d) and followed by the 4-day or 3-day declining-dose follicle-stimulating hormone superovulatory regimen, respectively, were compared using 16 estrous-cycling Santa Inês ewes. Non-surgical embryo recovery (NSER) procedures were performed 60 d apart starting 6 or 7 d after the onset of estrus; an i.m. injection of estradiol benzoate and of D-cloprostenol at 16 h was followed by an i.v. oxytocin injection administered 20 min before NSER. There was a longer (P<0.05) period before estrous onset in ewes during the second (September) compared with the first study replicate (July) by approximately 14 h. The NSER could be performed in 11 of 15 ewes that were in estrus, with an average of three viable-embryos/donor and the mean duration of the procedure being 29 min. There were no differences in superovulatory responses between the two groups of ewes, but there were only degenerated embryos in ewes of the G-6.5d group. In summary: i. the duration of progestin-priming and of multiple-dose pFSH treatment had a limited effect on superovulatory responses in estrous-cycling Santa Inês ewes; ii. NSER is a safe and repeatable method of embryo collection in ewes subsequent to superovulation; and iii. duration of the superovulatory treatment regimen may alter the effects of endogenous steroids on oocyte/embryo quality in ewes.
Palavras-Chave: | Progestin; Trans -cervical uterine flushing.
Thesagro: | Estradiol; Melhoramento Genético Animal; Ovino; Reprodução Animal; Superovulação; Transferência de Embrião.
Thesaurus Nal: | Animal reproduction; Breeding and Genetic Improvement; Embryo transfer; Estrus synchronization; Sheep; Superovulation.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39582-1) - UPC - AP - DD -  -  -  - DIS