RELATÓRIO DE ESTÁGIO CURRICULAR SUPERVISIONADO: REPRODUÇÃO DE BOVINOS

Abstract

The In Vitro Production of embryos is a technique that has grown worldwide, especially in Brazil, which guarantees the genetic selection of animals. It is capable of producing several offspring of an animal with high zootechnical potential, eliminating undesirable characteristics present in the herd. By using it, it is possible to reduce the evolution time between generations and guarantee greater production and quality of the herd and the end product, depending on the breeder's objective. Several factors influence the pregnancy rate of recipients, including extrinsic factors such as nutrition, management and heat stress, and intrinsic factors such as embryo quality and hormone production. Data on embryos from a farm in the state of Goiás was used: 240 transferred embryos, classified according to their blastocyst development, BL and BX, with the aim of evaluating which had the best result in terms of pregnancy. This assessment was carried out by ultrasound examination 30 days after innovation, i.e. 37 days after the conceptus was born. This study showed that embryos at a more advanced stage (BX) have higher pregnancy rates compared to embryos at an earlier stage (BL). This suggests that the stage of development of the embryo is directly related to the pregnancy rate of the recipients.