EFFICACY OF GnRH TREATMENT IN REPEAT BREEDER CATTLE
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Date
2018-09
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KARNATAKA VETERINARY ANIMAL AND FISHERIES SCIENCE'SUNIVERSITY, BIDAR-585226
Abstract
Efficacy of GnRH analogue (Buserelin acetate) treatment on the day of AI, 12th
day post AI or on both, the day of AI and 12th day post AI, on repeat breeder cattle was
analysed in 32 repeat breeder cattle. Animals were divided into four groups of 08 animals
each viz., group-I treated with 2.5mL(10mcg) GnRH analogue on the day of AI, group-II
treated with GnRH on 12th day post AI, group-III treated with GnRH both on day of AI
and 12th day post AI and group-IV were inseminated without treatment as a control
group. They were inseminated and blood sample was collected for analyzing
progesterone and alkaline phosphatase enzyme on the day of AI, 12, 20 and 40th day post
AI. There was a significant (P<0.05) increase in the progesterone concentration in
animals receiving GnRH treatment than control and AKP concentration increased
significantly (P<0.05) in pregnant animals. The conception rates of each group was 75%,
37.5%, 62.5% and 37.5% for group-I, II, III and IV respectively. The study concluded
that single dose of GnRH at the time of AI was most efficient treatment for repeat breeder
cattle
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