A total of 44 repeat breeding cows with clinical history of delayed ovulation were divided into 3 groups consisting of 9, 6 and 29 animals in group-I, II and III respectively. Animals of group-I and II were treated with HCG and placentrex as single dose 4 hours before insemination respectively. Animals of group-III were inseminated twice or thrice at 24 hours interval depending on the duration of estrus. Conception rate was found to be higher in animals of group-III (72.41%) than in animals of either group-I (66.67%) or group-II (33.33%).
Delayed ovulation, Dairy cattle
