Data/hora: 04/06/2024 04:41:19

Provedor de dados: | 86
País: | Brazil
Título: | Hormonal protocols for in vitro production of Zebu and taurine embryos
Autores: | Fernandes,Carlos Antônio de Carvalho; Miyauchi,Tatimara Maria; Figueiredo,Ana Cristina Silva de; Palhão,Miller Pereira; Varago,Fabiana Cristina; Nogueira,Ester Siqueira Caixeta; Neves,Jairo Pereira; Miyauchi,Tochimara Aparecida.
Data: | 2014-10-01
Ano: | 2014
Palavras-chave: | Bos indicus; Bos taurus; Artificial insemination; Follicle growth induction; Follicular wave synchronization; FSH stimulation.
Resumo: | The objective of this work was to evaluate the effects of hormonal synchronization protocols, associated or not with follicular development stimulation, on the recovery of oocytes and on in vitro production of Bos indicus and B. taurus embryos, in different seasons. Ultrasound-guided follicular aspirations (n=237) were performed without pre-treatment (G1, control group) and after follicular wave synchronization (G2), or after follicular wave synchronization and follicle growth induction (G3). Bos indicus produced more oocytes and embryos than B. taurus (18.7±0.9 vs. 11.9±0.6 oocytes and 4.8±0.3 vs. 2.1±0.2 embryos). On average, oocyte and embryo yields were higher in G3 than in G2, and both were greater than in G1, which lead to a higher conversion of oocytes to embryos in these treatments. The hot or the cold season did not affect the B. indicus outcomes, whereas, in B. taurus, both oocyte recovery and embryo production were higher in the cold season. Follicular wave synchronization improves ovum pick-up and in vitro production of embryos in both cattle subspecies evaluated.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001000813

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2014001000008
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.49 n.10 2014
Fonte: | info:eu-repo/semantics/openAccess