FERTILITY IMPROVEMENT BY HORMONAL THERAPIES IN REPEAT BREEDING COWS

Abstract

The present experiment was under taken to study the efficacy of progesterone and GnRH in repeat breeding
oeoni cows. Thirty two Deoni cows were selected and divided into four groups. Each group comprises eight
animals. Group I cows were administered inj. Hydroxyprogesterone@250 mg on 5th day of artificial insemination,
Group II cows were administered inj. GnRH@ 10 mcg at the time of artificial insemination, Group Ill cows were
administered inj. GnRH@ 10 mcg on 5th day of artificial insemination and Group IV remains untreated served as
control. The conception rate of groups I, II, Ill and IV was 50.00, 75.00, 62.50 and 25 per cent, respectively. The
conception rate of group II was higher than that of group I and group Ill. Thus the study reveals that the administration
of GnRH at the time of artificial insemination improves the conception rate in repeat breeder Deoni cows.