Fixed-time artificial insemination in Creole goats

Abstract

The objective was to determine the fertility in creole goats after artificial insemination at fixed time by using refrigerated semen. Twelve creole female goats were divided at random in 2 groups of 6 animals each. The first group was inseminated 48 hours and the second 60 hours ater pessarie removal. Estrus was synchronized by leaving fluorgestone acetate intravaginal pessaries (FGA, 40 mg) during 12 days and by injecting with 200 IU of pregnant mare serum gonadotropin (PMSG) by i.m. route. Semen was obtained from one refrigerated (4-5ºC) ejaculated stored in 0.25 ml french straw. Goats were in estrus at artificial insemination time. The kidding rate was 60% for 48 hours and 50% for group 60 hours. It is concluded that artificial insemination at fixed time at 48 or 60 hours with refrigerated semen was good.