Effect of day of the estrous cycle at the initiation of a timed artificial insemination protocol on reproductive responses in dairy heifers.

@article{Moreira2000EffectOD,
  title={Effect of day of the estrous cycle at the initiation of a timed artificial insemination protocol on reproductive responses in dairy heifers.},
  author={Fonseca Moreira and Rodolfo Luzbel de la Sota and Thais D{\'i}az and William Watters Thatcher},
  journal={Journal of animal science},
  year={2000},
  volume={78 6},
  pages={1568-76}
}
Our objectives were to identify stages of the estrous cycle at which initiation of a timed artificial insemination (Ovsynch/TAI) protocol may reduce pregnancy rates and to monitor ovarian follicle dynamics and corpus luteum development after initiation of the Ovsynch/TAI protocol at different stages of the cycle. Cycling Holstein heifers (n = 24) were injected twice with prostaglandin F2alpha to induce estrus and were scanned by ovarian ultrasonography to determine the day of ovulation (d 0… CONTINUE READING
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