Response on cyclicity evidenced by serum progesterone profile in post partum crossbred cows treated with GNRH PGF2Α

Abstract

The experiment was conducted on 24 post partum crossbred cows at private dairy farm and divided into three treatment (TG) and control (C) group (6 each) were monitored for serum progesterone on 14th,24th,27th,38th, 41st and 42nd of post partum following GnRH and PGf2α and in combination treatment TG-1 (GnRH - PGf2α), TG-2 (GnRH –N.S), TG-3 (N.S - PGf2α) and control (N.S – N.S) on day 14th and 24th with fixed timed artificial insemination by injecting PGf2α on day 38th in all the groups(except control) and reveals that mean serum concentration progestrone in TG-I,TG-II,TG-III and control1.74 ± 0.11, 1.72 ± 0.10, 1.70±0.09, 2.74±0.04 ng/ml. 4 in TG-I, 2 in TG-II,3 out of 6 treated cows in TG-III showed