Taxa de prenhez em vacas leiteiras submetidas a inseminação artificial em tempo fixo utilizando gonadotrofina coriônica equin / Pregnancy rate in dairy cows submitted to fixed time artificial insemination using equine chorionic gonadotropin

ABSTRACT

This study aimed to evaluate the pregnancy rate in cyclic lactating dairy cows inseminated at fixed timeusing eCG in the withdrawal of progesterone implant. The experimental design was a randomized blocks, twotreatments with 32 repetitions for G1 and 31 repetitions for G2. The G1 control group cows with hormonalprotocol with the use of eCG; G2 cows with hormonal protocol without using eCG. The study presented to theGroup eCG with pregnancy rate of 28.13%, while no eCG group had a 16.13% pregnancy rate. The statisticaldifference between the groups was not significant (p = 0.2522). In conclusion, the use of eCG had no influenceon the pregnancy rate.(AU)