Effect of estrus synchronization and superovulation protocol on the distribution of ovine embryos at different stages of development.

Abstract: The compatibility between the embryo development stage and the estrous cycle moment of the embryo recipient is an important factor in the multiple ovulation and embryo transfer (MOET) program. This aspect contributes significantly to the pregnancy establishment. Thus, the present study aimed to evaluate the effect of estrus synchronization and superovulation protocol on the distribution of ovine embryos at different stages of development. In conclusion, the protocol of estrus synchronization and superovulation was efficient in the synchronization of ovulation, which reflected in the prevalence of embryos in the stage of compact morula, when the collection is performed between days D6 and D7 after the first natural mating. This time relative do estrus onset should be revised to 6 to 7 day to allow recovering of more advanced than younger embryonic stages, specially for cryopreservation. [Efeito do protocolo de sincronização do cio e superovulação na distribuição de embriões ovinos em diferentes estágios de desenvolvimento].