Pulsatile release of oxytocin during the estrous cycle, pregnancy and parturition in sheep

Mitchell, M.D., Kraemer, D.L., Brennecke, S.P. and Webb, R. (1982) Pulsatile release of oxytocin during the estrous cycle, pregnancy and parturition in sheep. Biology of Reproduction, 27 5: 1169-1173. doi:10.1095/biolreprod27.5.1169


Author Mitchell, M.D.
Kraemer, D.L.
Brennecke, S.P.
Webb, R.
Title Pulsatile release of oxytocin during the estrous cycle, pregnancy and parturition in sheep
Journal name Biology of Reproduction   Check publisher's open access policy
ISSN 0006-3363
Publication date 1982-12-01
Sub-type Article (original research)
DOI 10.1095/biolreprod27.5.1169
Volume 27
Issue 5
Start page 1169
End page 1173
Total pages 5
Place of publication Madison, WI, U.S.A.
Publisher Society for the Study of Reproduction
Language eng
Subject 1103 Clinical Sciences
1114 Paediatrics and Reproductive Medicine
Abstract Oxytocin has been measured in peripheral plasma from chronically catheterized sheep both during estrus and the early luteal phase of the estrous cycle and also during pregnancy at 122-124 days gestation, 141-145 days gestation and during spontaneous labor at term. In each experiment, blood samples were collected at 5-min intervals for 120 min and also at 1-min intervals for 10 min. In pregnant and nonpregnant sheep, pulsatile patterns of oxytocin concentrations were found in the experimental periods. Mean concentrations of oxytocin were significantly higher in plasma obtained during the luteal phase of the cycle when compared to samples taken during estrus. Moreover, concentrations of oxytocin were increased with length of gestation and labor. It is concluded that oxytocin secretion is episodic in sheep during both the estrous cycle and pregnancy.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: UQ Centre for Clinical Research Publications
 
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Created: Thu, 26 Aug 2010, 13:05:06 EST