Preliminary experiment to induce superovulation in yak

摘要

Different hormonal treatments, including follicle-stimulating hormone (FSH) and pregnant mare serum gonadotropin (PMSG), were tested to induce superovulation in yak cows. During superovulation, the average numbers of follicles developed in the right and left ovaries of the cows ovulated were 5.36 ± 0.65 and 4.46 ± 0.43, respectively, and the numbers of ovulated eggs from the right and left ovaries were 2.55 ± 0.30 and 1.94 ± 0.2, respectively. Onset of donor's oestrus was detected on average, at 34.1 ± 0.52 hours after prostaglandin injection.