Evaluating Efficacy of Ovsynch and Ovsynch Plus Early Luteal Phase GnRH Protocols on different days of Estrous cycle in Repeat Breeder cows Ahmed N.*, Das B.B., Sinha S., Vanlalhriatpuia, Doley S.1 Veterinary Dispensary, Animal Resources Development Department, P.O. Dalugaon PS: Kailashahar, Unakoti-799280 (Tripura) 1Junior Research Fellow, C.V. Sc., A.A.U., Khanapara, Guwahati *Veterinary Officer and Corresponding author. E-mail: nekibahmeds@gmail.com
Online published on 20 November, 2017. Abstract The study was designed to compare the efficacy of Ovsynch plus early luteal phase GnRH treatment at random and at 6th day of estrous cycle on estrus pattern and fertility in repeat breeder cows. Time required for onset of signs of estrus in Group I and II from PGF2α injection was 47.21±3.67 and 52.09±4.87 hours respectively. Conception rate in Group I and II was found to be 33.33 and 66.67 percent respectively. Accessory corpus luteum was found in all cows subsequent to GnRH on 6th day of estrous cycle. Initiation of Ovsynch plus early luteal phase GnRH treatment on 6th day of estrous cycle was found to be better in repeat breeder cows. Top Keywords Accessory corpus luteum, conception rate, estrus, ovsynch, repeat breeder. Top |