Age and hormonal dependence of acquisition of oocyte competence for embryogenesis in prepubertal calves.

@article{Presicce1997AgeAH,
  title={Age and hormonal dependence of acquisition of oocyte competence for embryogenesis in prepubertal calves.},
  author={Giorgio Antonio Presicce and Shie Jiang and M E Simkin and Li-sheng Zhang and C. R. Looney and Robert A. Godke and Xiaoyu Yang},
  journal={Biology of reproduction},
  year={1997},
  volume={56 2},
  pages={386-92}
}
This research was designed to improve our understanding of oocyte maturation and acquisition of developmental competence of oocytes using prepubertal heifers as a model. Oocytes were collected by ultrasound-guided transvaginal oocyte retrieval from 20 age-matched calves at 5, 7, 9, and 11 mo of age that had or had not received gonadotropin stimulation. Numbers of oocytes recovered from unstimulated heifers decreased with age, being 15 +/- 2, 12 +/- 1, 7 +/- 1, and 7 +/- 1 (for 5-, 7-, 9-, and… CONTINUE READING

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