Effect of Oestrous Synchronization using PGF2? on Subsequent Fertility

Abstract

This study was conducted to monitor the oestrous response to prostaglandin (PGF2?) treatment and subsequent fertility on days 45, 60 and 90 post-partum (pp). A total number of 30 Nubian goats were equally divided into three groups (n = 10) and given double intramuscular injections of 125? cloprostenol, 11 days apart. Goats detected in oestrus were handmated twice on 1st and 2nd day of oestrus. The conception, fecundity and prolificacy rates were measured 40-60 days after mating using ultrasonography. The accuracy of ultrasonographic detection of pregnancy was 100% for both pregnant and non pregnant females and the results were confirmed at parturition. The results indicated that the conception rate was high on day 60 pp (30%) compared with day 45 (20%) and day 90 (20%) pp. Fecundity rate was 40% on day 60 pp, 30% on day 45 pp and 20% on day 90 pp. Prolificacy rate was 150% on day 45 pp, 133.3% on day 60 and 100% on day 90 pp. The differences in these parameters among the groups were not significant (p < 0.05). It could be concluded that fertility rates in Nubian goats synchronized by PGF2? on days 45, 60 and 90 pp were low and there were no significant difference among the groups.