Effect of FSH dose on the super ovulatory response in Punganur Cows

Abstract

The study was aimed to evaluate the super ovulatory response in Punganur cows by using low doses of FSH wherein donor cows were treated with 160 and 200 mg of Folltropin ®V to assess the ovarian response, follicular development, total number of ovulations per animal, embryos recovered, and concentrations of estrogen at different stages of the treatment. The results indicated that 200 mg FSHp has significantly higher ovarian response with a greater number of follicles per animal, but with no significant difference in total number of ovulations, embryos recovered, and viable embryos between groups. The concentration of estrogen was significant among different treatment days within each group, but with no significant difference between groups. However, a negative correlation was observed between the concentration of estrogen on the day of initiation of superovulation with number of ovulations and embryos collected indicating an inverse relationship. In conclusion, super ovulatory response, follicular growth, and embryo recovery rate was superior with 200 mg compared to 160 mg FSH.