Transferência de embriões em tempo fixo em bovinos

Abstract

Reproductive biotechnologies enable the genetic development of the national herd, resulting in greater profitability to the rural producer. The objective of this study was to report how fixed-time embryo transfer is performed in Nelore cattle. Gynecological evaluation is of paramount importance in reproductive management, because from it it is possible to obtain important data about the reproductive system of the matrices that will be destined for reproductive management. The gynecological examination is done through rectal palpation and ultrasound, this method allows the technician responsible for reproductive management to know whether or not the recipient is able to receive the pharmacological protocol of induction to heat. Among the various reproduction biotechnologies, fixed-time embryo transfer (TETF) together with in vitro embryo production (PIVE) has contributed to an exponential improvement in the national herd. The heat induction protocols for TETF have used 3 managements, and on day zero of the protocol (D0) 2 ml of estradiol benzoate and intravaginal implantation of the progesterone device are administered on day 7, 8 or 9, the removal of the device employed with progesterone and the application of estradiol cypioate (CE) occurs, Equine corionic gonadotrophy (ECG) and prostaglandin (PGF2α) and in D17 embryo transfer occurs.