Progesterone, follicular, and estrual responses to progesterone-based estrus and ovulation synchronization protocols at five stages of the estrous cycle.

@article{Stevenson2008ProgesteroneFA,
  title={Progesterone, follicular, and estrual responses to progesterone-based estrus and ovulation synchronization protocols at five stages of the estrous cycle.},
  author={Jeffrey S. Stevenson},
  journal={Journal of dairy science},
  year={2008},
  volume={91 12},
  pages={4640-50}
}
The objective was to monitor changes in ovarian status in heifers exposed to a progesterone insert with or without concurrent GnRH injection. Estrus was manipulated in 283 heifers (31 breeding clusters) by administering GnRH, progesterone, and PGF(2alpha) at 5 stages of the estrous cycle. Estrus was presynchronized with a progesterone insert (CIDR) for 7 d before PGF(2alpha) was administered 24 h before insert removal. Successive clusters of heifers were assigned to treatments (2 heifers per… CONTINUE READING

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