Postpartum ovarian activity in dairy cows using radioimmunoassay for milk progesterone determination

Authors

  • CF. Meirelles Universidade de São Paulo; Departamento de Zoologia da E.S.A.Luiz de Queiroz
  • A.L. Abdalla Universidade de São Paulo; Centro de Energia Nuclear na Agricultura
  • D.M.S.S. Vitti Universidade de São Paulo; Centro de Energia Nuclear na Agricultura
  • J.C. Silva Filho Universidade de São Paulo; Centro de Energia Nuclear na Agricultura

DOI:

https://doi.org/10.1590/S0071-12761988000100003

Keywords:

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

Abstract

A private farm was used to study the postpartum ovarian activity in dairy cows in São Paulo State. Milk samples were collected from 26 animals, twice weekly for one year to monitor the progesterone profile using the radioimmunoassay in detecting the first oestrus in postpartum. The percentage incidence of cows with detectable ovarian activity was 61.1% for animals 31 to 60 days postpartum.

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Published

1988-01-01

Issue

Vol. 45 (1988)

Section

Articles

How to Cite

Meirelles, C., Abdalla, A., Vitti, D., & Silva Filho, J. (1988). Postpartum ovarian activity in dairy cows using radioimmunoassay for milk progesterone determination . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 45, 53-65. https://doi.org/10.1590/S0071-12761988000100003