EFFECT OF ADMINISTRATION OF hCG BEFORE THE ONSET OF OESTRUS FOLLOWING PGF2α TREATMENT ON CONCEPTION RATE IN REPEAT BREEDER COWS
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Date
2010
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Abstract
Regulating oestrus using oestrus synchronizing agents may help to increase the conception rate in repeat
breeder cows. A total of 48 repeat breeder cows were divided into 3 groups viz., group I, II and III. Cows
in group I and II were treated with 0.98 mg of Tiaprost (PGF2α) on day 10 following natural oestrus (day
0). Group III cows, served as control without any treatment. AI was done at 72 (first AI) and 96 (second
AI) hours following PGF2α therapy in group I and II. Group III cows were artificially inseminated twice at
24 hours interval during natural oestrus. Group II cows were injected with 1500 IU hCG at 24 hours prior
to first AI. There was 100 per cent oestrus response in PGF2α treated cows in group I and II. The first
service conception rate obtained was 43.75, 43.75 and 18.75 per cent, in group I, II and III, respectively.
Description
TNV_IJFV_2010_5(3)23-24
Keywords
Veterinary Science