RELATIONSHIP BETWEEN FIRST OVULATION AND PREGNANCY OUTCOME IN EARLY POSTPARTUM DAIRY COWS
Keywords:
First ovulation, HFx, Ovarian resumption, Pregnancy outcomeAbstract
The aim of the study was to investigate the relationship between the first postpartum ovulation and subsequent
fertility in dairy cows. Forty HF crossbred cows were subjected to ultrasonography examination of ovaries at 72 hours
interval from day 7 to 60 days postpartum. Ovulation was confirmed by the disappearance of the dominant follicle that
had been detected at the previous examination and subsequent CL formation. The cows which were ovulated between
10 to 26 (21 ± 1.56) days postpartum were conceived within 90 days.