College of Veterinary Science, Rajendranagar, Hyderabad – 500 030, India.
*M.V.Sc. Thesis submitted to Sri Venkateswara Veterinary University, Hyderabad.
The efficacy of GnRH, PMSG and Placentrex therapeutic protocols in inducing estrus and enhancing conception rate in true anestrum buffaloes was studied. The experimental buffaloes were randomly divided in to 4 groups each consisting of 20 each. Among 80 buffaloes treated with various protocol (60 affected with postpartum anoestrum + 20 healthy cyclic buffaloes), the estrus response was found to be 70, 90, 80 and 50 percent, respectively in GnRH, PMSG, Placentrex and control group. The days taken for the onset of estrus in PMSG (74.46±12.78days) were found to be lower than GnRH (85.11±18.92 days), Placentrex (78.52±13.92 days) and control (93.55±21.84 days) groups. The intensity of estrus was observed to be better in PMSG and Placentrex groups than in GnRH and control groups. The duration of estrus was found to be significantly longer in PMSG (16.37±3.62 hrs) treated buffaloes. Similarly the interval between treatment and onset of estrus was observed to be significantly earlier in PMSG group (7.22±0.49 days) than in GnRH (10.5±0.63), Placentrex (11.25±0.54 days) and control (53±1.13days), groups, respectively. The overall conception rate was better in PMSG (77.78 per cent) group than GnRH (64.29 per cent), Placentrex (68.75 per cent) and Control (40 per cent) groups. The mean number of services required per conception in true anoestrus postpartum buffaloes treated with GnRH, PMSG, placentrex and control groups were recorded as 1.55±0.24, 1.71±0.22, 1.81±0.26 and 2.25±0.48, respectively
Postpartum true anoestrum, Murrah buffaloes, GnRH, PMSG, Placentrex
