Avaliação da influência da gonadotrofina coriônica equina (ecg) na taxa de prenhez em vacas nelores submetidas a protocolos de inseminação artificial em tempo fixo - iatf

Abstract

Brazil is rated as one of the world's leading beef exports, and holds the second largest commercial herd. In cattle herds there is no doubt that reproductive efficiency is a determining factor to have a good economic return on beef cattle. With the Fixed Time Artificial Insemination (IATF), the difficulties and barriers are being overcome, thus improving the reproductive indexes in the farms that adhere to the IATF. The use of equine chorionic gonodrotonic-eCG can further improve the indexes, since ecg binds to the LH and FSH receptors having follicle stimulating and luteinizing function. The objective of this research was to evaluate the influence of equine chorionic gonodrotophin (eCG) on the pregnancy rate in nelor cows submitted to FTAI protocols. Seventy-five female Nelore cattle, aged 2 to 8 years old, were submitted to an individual clinical examination, with emphasis on the reproductive system and divided into two groups: control group with saline administration and test group with administration Of 300 IU of eCG. In the control group, the result was 50% (20/40); in the test group, a result of 53.3% (16/30) of pregnant cows was found. The study did not demonstrate a significant difference in the Pregnancy when using eCG