Effects of cloprostenol sodium and clenbuterol HCl on reproductive performance in postparium anestrous cows

Y. Hu, M. D. Wright, R. M. Dyer, K. P. Nephew, R. P. Bolze, M. L. Day

Research output: Contribution to journalArticle

Abstract

Two experiments were conducted to study effects of cloprostenol sodium (cloprostenol) and clenbuterol HCl (clenbuterol) during postpartum anestrus on subsequent reproductive performance in cows. In Experiment I, 96 cows received either 0.5 mg cloprostenol (PGF, n = 25), 364 mg clenbuterol (CLEN, n = 24), 0.5 mg cloprostenol and 364 mg clenbuterol (CLEN+PGF, n = 21) or no treatment (Control, n = 26) on Day 20 post partum. Treatments failed to influence postpartum interval, pregnancy rate or the incidence of short estrous cycles preceding the first normal estrous cycle. In Experiment II, anestrous cows were administered cloprostenol (0.5 mg) on either Day 20 (PGF20, n = 27) or Day 35 post partum (PGF35, n = 25), or served as untreated controls (Control, n = 26). Neither postpartum interval nor pregnancy rate were affected by cloprostenol treatment. In conclusion, treatment of postpartum cows with PGF did not alter the resumption of normal estrous cycles following parturition.

Original languageEnglish (US)
Pages (from-to)127-132
Number of pages6
JournalTheriogenology
Volume34
Issue number1
DOIs
StatePublished - Jul 1990
Externally publishedYes

Keywords

  • beef cows
  • clenbuterol
  • cloprostenol
  • postpartum interval

ASJC Scopus subject areas

  • Small Animals
  • Food Animals
  • Animal Science and Zoology
  • Equine

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