Publications by authors named "Danilo Zago Bisinotto"
We aimed to evaluate the effects of administering estradiol (E-17β) at the moment of timed-AI (TAI) on uterine gene expression, estrous expression rate (EER), and pregnancy rate (P/TAI) in Nelore cows with a small dominant follicle (DF) or not showing estrus at TAI. In Experiments 1 and 2 (Exp1, Exp2) cows were submitted to a P4/E-17β-based protocol (day 0) for synchronization of ovulation. On day 7, devices were removed, cows received 1 mg E-17β cypionate and 12.
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- The study evaluated the reproductive performance of Nelore lactating cows undergoing a resynchronization process 12 days after timed artificial insemination (TAI) using either a long-acting progesterone (P4-LA) treatment or a control without it.
- Results showed no significant differences in pregnancy rates at various stages between the control and P4-LA groups but indicated higher estrous detection and pregnancy rates in the P4-LA group during the second TAI.
- Overall, while both groups had similar cumulative pregnancy rates after two TAIs, the use of P4-LA appears to enhance early resynchronization strategies for improving fertility in beef cows.