Alterations in Uterine Contractility During the Oviposition Cycle in Domestic Hens

N. Saito, T. I. Koike

Research output: Contribution to journalArticle

15 Citations (Scopus)


The potencies of several neurohypophysial hormones were examined at different times during the oviposition cycle in an in vitro fowl oxvtocic assay. Uterine tissues were removed 2 h before (—2h-OP), immediately after (Oh-OP) and 5 h after (+5h-OP) spontaneous oviposition. In addition, uterine tissue was removed immediately after oviposition was induced, by administering prostaglandin E2 2 h before an expected oviposition (Induced-OP). The rank order of oxytocic potencies for the peptides was arginine vasotocin=vasopressin>oxytocin>mesotocin. The sensitivity of the uterus to the hormones was Oh-OP = Induced-OP> — 2h-OP= + 5-OP. These results suggest that uterine sensitivity to neurohypophysial hormones changes during the oviposition cycle in domestic fowls.

Original languageEnglish
Pages (from-to)671-676
Number of pages6
JournalBritish poultry science
Issue number3
Publication statusPublished - Jul 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology

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