USE OF CIDR PLUS PGF2α IN CROSSBRED COWS HAVING MATURED CL FOR ENHANCED CONCEPTION RATE
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Authors
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Kanaga Devi M
Post-graduate student, VGO, MVC, Tamil Nadu Veterinary and Animal Sciences University
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Krishnakumar K
Professor and Head, Department of VGO, MVC, Tamil Nadu Veterinary and Animal Sciences University
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Sarath T
Assistant Professor, Tamil Nadu Veterinary and Animal Sciences University
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Tirumurugaan K.G
Professor,Tamil Nadu Veterinary and Animal Sciences University
Keywords:
CIDR, Conception rate, Crossbred cows, Induced estrus, PGF2αAbstract
Thirty healthy, parous, cyclic crossbred cows aged under 8 years were selected and randomly divided into two groups as group I (n=10) and group II (n=20). Group I served as control and group II cows were synchronized with CIDR + PGF2α protocol in the presence of matured CL. Breeding was carried during the observed estrus in group I and at 48 and 72 h after removal of CIDR in group II cows with good quality frozen thawed Jersey crossbred semen. The group II cows showed 100 per cent estrus induction with a mean time of onset of induced estrus of 46.20 ± 0.50 h in group II cows. The duration of estrus was 25.40 ± 0.45 and 26.30 ± 0.47h in group I and group II, respectively. The incidence of intense and intermediate estrus was significantly higher in group II when compared with group I cows. The length of estrus in non-conceived cows was 22. 13 ± 0.52 and 21. 37 ± 0.62 days in group I and II, respectively with a conception rate of 20 and 60 per cent in group I and II. It was concluded that application of CIDR and PGF2α with FTAI was effective in improving conception rate in cross bred cows.
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References
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