Effect of Gonadotrophin Releasing Hormone (GnRH) on ovulation in Buffaloes Superovulated with pregnant mare serum gonadotrophin

Abstract

Four healthy normally cycling buffaloes were selected and superovulated with 2500 IU PMSG 
each. Half of the donors (Group A) were given 0. 1 mg GnRH (Vet Veb Berlin Chemie) on day O at the time of artificial insemination. Superovulation response was assessed on day 7 by rectal palpation of ovaries. On an average 
there were 4.0±0.0, 4.0± 1.0 Corpora lutea and 1.0± 1.0, 1.0, 4.0±4.0 unovulatory follicles (UF) 
for group A and B, respectively. Ovulation rate was 80 per cent ( 4 / 5) for group A and 50 
per cent (4/8) for group B.