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Dev Psychobiol. 2001 May;38(4):229-38.

Variation in reproductive traits is associated with short anogenital distance in female rats.

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  • 1Department of Psychology, Emory University, Atlanta, GA 30322, USA.


Anogenital distance was used as a biomarker for natural variation in prenatal androgenization of female rats and was associated with individual differences in a suite of reproductive characteristics. Females with short anogenital distances were likely to have first vaginal estrus earlier than females with longer anogenital distances and to have first vaginal estrus on the same day as vaginal opening. In young adulthood, females with short anogenital distances had shorter ovarian cycles and less intense lordosis reflexes in response to manual palpation than those with longer anogenital distances, but only when living individually, not in groups. Taken together, these findings indicate that prenatal androgenization affects reproductive traits throughout the life span.

Copyright 2001 John Wiley & Sons, Inc.

[PubMed - indexed for MEDLINE]
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