COMPARATIVE EFFICACY OF NORGESTOMET-BASED ESTROUS INDUCTION PROTOCOLS IN BEETAL GOAT

Abstract

Sixty post-partum anestrus beetal goats were randomly divided into three groups of 20 each to compare the efficacy of norgestomet with or without prostaglandin (PGF2α) or eCG or both. Each goat subcutaneously received half norgestomet implant (1.5 mg) for 11 days either with eCG 500 IU on day 9 (Gp Norg+eCG), with PGF2α 50 μg on day 10 (Gp Norg+PG) or with both eCG and PG on day 9 and 10 of protocol, respectively (Gp Norg+eCG+PG). Subsequent to implant removal, estrus was detected twice a day using aproned buck and animals in estrus were mated twice at 12 h interval. Among the groups, highest estrus response (p>0.05) and minimum time to onset of estrus (p<0.05) following implant removal was observed in gp Norg+eCG+PG compared to other groups, although the duration of estrus was similar (p>0.05) between groups. Conception rate and total kids varied between groups in the range of 57.9 to 83.3% and 19 to 28, respectively, with highest (p<0.05) kidding rate in gp Norg+eCG. In brief, norgestomet-based protocol can be successfully used to induce estrus in anestrus Beetal goats.