Extension of short cycles in postpartum beef cows by intrauterine treatment with catecholestradiol

Kenneth Nephew, S. P. Ford, M. L. Day, W. F. Pope

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Eight multiparous beef cows were used to examine the effects of intrauterine infusion of catecholestradiol (4-hydroxylated estradiol) on development and function of the first corpus luteum after parturition. Calves were weaned on day 1 (day 0 = parturition) to initiate formation of a corpus luteum (CL) by approximately day 10 or 11. Before CL formation, on days 5 to 9, cows received twice daily infusions of catecholestradiol (4 μg; n = 4) or vehicle (n = 4) into the uterine horn opposite the previous pregnancy. Plasma progesterone during the first estrous cycle was elevated longer (P2α (PGFM) in all cows infused with catecholestradiol. In contrast, a rise in PGFM at the end of the first short cycle was detected in only one of four cows treated with vehicle. Furthermore, PGFM concentrations were linearly related (R2 = .870; P

Original languageEnglish (US)
Pages (from-to)363-370
Number of pages8
JournalDomestic Animal Endocrinology
Volume6
Issue number4
DOIs
StatePublished - 1989
Externally publishedYes

Fingerprint

Corpus Luteum
beef cows
corpus luteum
Postpartum Period
cows
Parturition
parturition
intrauterine administration
Estrous Cycle
estrous cycle
Progesterone
estradiol
Estradiol
progesterone
pregnancy
calves
Pregnancy
15-keto-13,14-dihydroprostaglandin F2alpha

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Endocrinology
  • veterinary(all)

Cite this

Extension of short cycles in postpartum beef cows by intrauterine treatment with catecholestradiol. / Nephew, Kenneth; Ford, S. P.; Day, M. L.; Pope, W. F.

In: Domestic Animal Endocrinology, Vol. 6, No. 4, 1989, p. 363-370.

Research output: Contribution to journalArticle

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