Document Detail


Contractility of the ovarian vascular bed during the oestrous cycle and early pregnancy in gilts.
MedLine Citation:
PMID:  6726689     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
L P Reynolds; S P Ford
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of reproduction and fertility     Volume:  71     ISSN:  0022-4251     ISO Abbreviation:  J. Reprod. Fertil.     Publication Date:  1984 May 
Date Detail:
Created Date:  1984-06-22     Completed Date:  1984-06-22     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0376367     Medline TA:  J Reprod Fertil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  65-71     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Electric Stimulation
Estradiol / blood
Estrone / blood
Estrus*
Female
Hemodynamics
Ovary / blood supply*
Perfusion
Pregnancy
Pregnancy, Animal*
Progesterone / blood
Swine
Chemical
Reg. No./Substance:
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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