Postpartum ovarian activity in holstein cows at ESALQ herd, USP, Piracicaba, São Paulo State

Authors

  • C.F. Meirelles Universidade de São Paulo; Departamento de Zoologia da E.S.A. Luiz de Queiroz
  • A.L. Abdalla Universidade de São Paulo; Seção de Ciências Animais do Centro de Energia Nuclear na Agricultura
  • D.M.S.S. Vitti Universidade de São Paulo; Seção de Ciências Animais do Centro de Energia Nuclear na Agricultura
  • M.R.S.R. Peçanha Universidade de São Paulo; Seção de Ciências Animais do Centro de Energia Nuclear na Agricultura

DOI:

https://doi.org/10.1590/S0071-12761988000100013

Keywords:

ovarian activity, postpartum, dairy cow, progesterone, skim-milk

Abstract

With the aid of the radioimmunoassay technique, the progesterone profile of 32 cows and their reproductive performance were studied. It was estimated that the base line between folicular and luteal phase was 1,12 ng (P4)/ml of skim milk. The first ovulation in postpartum occured within 36.83 ± 18.92 days. The authors suggested that there is no difference in time required to restart the ovarian function in the postpartum of animals in tropical or temperate climate.

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Published

1988-01-01

Issue

Vol. 45 (1988)

Section

Articles

How to Cite

Meirelles, C., Abdalla, A., Vitti, D., & Peçanha, M. (1988). Postpartum ovarian activity in holstein cows at ESALQ herd, USP, Piracicaba, São Paulo State . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 45, 179-189. https://doi.org/10.1590/S0071-12761988000100013