Abstract
The work was conducted in 272 repeat breeder cows diagnosed with functional form of infertility, i.e. luteal insufficiency and ovulatory defects. The objective of present study was to evaluate the efficacy of synchronization protocols in functionally infertile repeat breeder cows. These cows were divided into 4 treatment, viz. Ovsynch, Ov-cosynch, Doublesynch, Heatsynch and one control group. The overall conception rate of Ovsynch treatment protocol was significantly higher than control cows. Similarly, the mean diameter of dominant follicle in cows treated with Ovsynch protocol was significantly higher than cows treated with Doublesynch and Heatsynch protocols. Also, the mean diameter of dominant follicle prior to artificial insemination in the cows treated with Ovsynch protocol was significantly higher in comparison to control cows. In conclusion, Ovsynch protocol fared better in terms of conception in repeat breeder cows.
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