The effect of interruption of pregnancy on fertility was evaluated in 50 Holstein heifers, carrying male fetuses ranging from 55 to 90 days post conception. Abortion was induced by administration of sodic cloprostenol after fetal gender diagnosis. Heifers were inseminated on the second normal estrus after abortion. The interruption of gestation was 86% in treated animals, and route of administration, IM ou IV (intra-vulvar), did not affect the rate of abortion. The abortion to first insemination and abortion to conception intervals were 38.94± 4.96 and 47.32± 15.89 days, respectively. No difference on the number of inseminations per conception before or after the interruption of pregnancy (1.22 vs. 1.34; P>0.05) was observed. It was conclude that abortion induction in the first third of pregnancy did not affect heifer fertility.
Bovine; pregnancy; abortion induction; prostaglandin; conception rate
