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Updated: Aug 15, 2026

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Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats
Published on: October 13, 2018
Plasma testosterone levels are higher in old mating rats than in old non-mating rats
Experimental Gerontology
|January 1, 1984
Abstract:
About one-half of 96 aged rats mated at 20 months of age. Their plasma LH and prolactin concentrations were similar to those in non-mating old rats, but their plasma testosterone concentrations were significantly higher. Exogenous testosterone administration failed to change the sexual status of the non-mating group.

