| Contractility of the ovarian vascular bed during the oestrous cycle and early pregnancy in gilts. | |
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MedLine Citation:
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PMID: 6726689 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The vasoconstrictor activity of the ovarian vascular bed in vitro was investigated during the oestrous cycle and early pregnancy. Gilts were killed during the follicular phase (Days 20 to +1; N = 5) or luteal phase (Days 11 to 13; N = 4) of the oestrous cycle, or on Day 13 of pregnancy (N = 5). Immediately before death, a sample of vena cava blood was obtained for determination of progesterone and oestrogen (oestrone and oestradiol-17 beta) concentrations. One ovary was removed, cannulated, perfused in vitro, and subjected to 10-min infusions of saline (vehicle control) and noradrenaline. Vasoconstriction was provoked by electrical stimulation at the end of each infusion. Ovaries from luteal-phase gilts exhibited greater (P less than 0.01) vasoconstriction than did ovaries from follicular-phase and pregnant gilts at the end of saline and noradrenaline infusions. The oestrogen to progesterone ratio was less (P less than 0.01) for luteal-phase and pregnant than for follicular-phase gilts. Vasoconstriction was negatively correlated (r = -0.99, P less than 0.01) with the oestrogen to progesterone ratio in systemic blood of gilts during the oestrous cycle but not during early pregnancy (r = +0.39, P greater than 0.10), possibly due to an effect of the conceptuses. |
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Authors:
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L P Reynolds; S P Ford |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of reproduction and fertility Volume: 71 ISSN: 0022-4251 ISO Abbreviation: J. Reprod. Fertil. Publication Date: 1984 May |
Date Detail:
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Created Date: 1984-06-22 Completed Date: 1984-06-22 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376367 Medline TA: J Reprod Fertil Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 65-71 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Electric Stimulation Estradiol / blood Estrone / blood Estrus* Female Hemodynamics Ovary / blood supply* Perfusion Pregnancy Pregnancy, Animal* Progesterone / blood Swine |
| Chemical | |
Reg. No./Substance:
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50-28-2/Estradiol; 53-16-7/Estrone; 57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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