Follicular population at the beginning of pFSH treatment in Morada Nova ewes submitted to estrous synchronization protocols by short- (6 days), medium- (9 days) or long-term (12 days).

VERGANI, G. B.; ARRAIS, A. M.; MELLO, M. R. B. de; DIAS, J. H.; SOUSA, M. A. P. de; MORAIS, M. C. da C.; FERREIRA, H. C.; BEVILAQUA, J. R.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da

Follicular population at the beginning of pFSH treatment in Morada Nova ewes submitted to estrous synchronization protocols by short- (6 days), medium- (9 days) or long-term (12 days).

Autores

SOUZA-FABJAN, J. M. G.

Descripción

Abstract: The variability of superovulatory responses is still a limiting factor for the consolidation of commercial embryo transfer programs in small ruminants (Bartlewski et al. 2016. Theriogenology, 86: 130-143). Superovulation protocols are traditionally performed with prior use of progesterone devices for short- or long-term duration (Oliveira et al. 2014. Anim Reprod Sci, 144: 30-37) associated exogenous FSH administration. The presence of dominant follicles in the ovary at the beginning of FSH treatment is detrimental to the growth of the other follicles, in addition, a greater number of antral follicles is required to have a bigger superovulatory response (Fonseca et al., 2010 Acta Sci Vet, 38: 337-369). In this context, the objective of this study was to evaluate the follicular population at the beginning of pFSH treatment in Morada Nova sheep submitted to different estrous synchronization protocols (short- 6 days, medium- 9 days or long-term -12 days duration). It is expected that these protocols will be associated with better superovulatory responses and embryo production of Morada Nova sheep. [População folicular no início do tratamento com pFSH em ovelhas Morada Nova submetidas a protocolos de sincronização de estro de curta (6 dias), média (9 dias) ou longa duração (12 dias)].
Edição dos resumos do XXIII Congresso Brasileiro de Reprodução Animal, Gramado, RS, Brasil, 15 a 17 de maio 2019.

Palabras clave

Ovarian population, População ovariana, Ovino, Ovelha, Progesterona, Superovulação, Reprodução Animal, Transferência de Embrião, Sheep, Animal reproduction, Progesterone, Superovulation, Embryo transfer