Correlation of plasma LH and prolactin levels with the fate of the corpus luteum in the vole, Microtus agrestis

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Authors:
S. R. Milligan
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Pamela C. B. MacKinnon
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DOI:
https://doi.org/10.1530/jrf.0.0470111
Volume/Issue:
Volume 47: Issue 1
Page Range:
111–113
Article Type:
Research Article
Online Publication Date:
May 1976
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Department of Agricultural Science and Department of Human Anatomy, University of Oxford, Oxford, U.K.

Ovulation in the vole (Microtus agrestis) occurs about 9-12 hr after mating (Austin, 1957; Breed & Clarke, 1970). Following ovulation, the CL may be `short-lived' and start to degenerate within 48 hr of their formation, or become fully functional when the animal becomes pregnant or pseudopregnant (Milligan, 1974, 1975a). The fate of the CL is determined by whether mating activates a reflex mechanism separate from that controlling ovulation; limited amounts of mating, e.g. a single intromission, often give rise to only short-lived CL and greater amounts of mating stimulate luteal function more consistently (Milligan, 1975a). The hormonal basis of such observations was investigated in the present study by relating the plasma levels of LH and prolactin after mating with the fate of the resulting CL.

Laboratory-bred voles (see Breed, 1969) were used ; females were mature virgins

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Print ISSN:
1470-1626
Online ISSN:
1741-7899