M. Mashayekhi

Effects of different doses of human chorionic gonadotropin at timed artificial insemination on the fertility of lactating dairy cows

The aim was to investigate the effects of administering GnRH and low (1650 IU) or high (3300 IU) doses of human chorionic gonadotropin (hCG) at timed artificial insemination (TAI) on the rates of ovulation and pregnancy in lactating dairy cows. Forty-seven multiparous lactating d...