Authors : Amirali Kaveh, Ali Mohammadi and Mehrdad Nazeri
Abstract: Artificial insemination breeding programs have long been recommended for dairy producers that raise heifers for herd replacements because of the proven genetic and economic advantages of using AI compared with using natural service bulls for breeding dairy cattle. The aim of this study were to determine the effects of a CIDR insert incorporated into a presynchronized timed AI protocol on detection of estrus, ovulation rate, pregnancy rates and late embryonic loss in high-producing dairy cows. In this study, 60 Holstein dairy cows were allocated into 2 groups of 30 cows. Group 1 (control group) no received any treatments. Group 2 as treatment group received CIDR on day 14 of post AI. Data showed that there is a significant difference among groups in emergence of estrus.
Amirali Kaveh, Ali Mohammadi and Mehrdad Nazeri , 2011. Early Detection of Non-Pregnant Holstein Cows Subjected to Artificial Insemination by Administration of Intravaginal Progesterone (CIDR). Research Journal of Biological Sciences, 6: 357-360.