Abstract
The purpose of this experiment was to determine whether the presence of androgen neonatally influences the development of temporal patterning of male copulatory behavior in rats. Neonatally castrated males, neonatally androgenized females, and postpubertally castrated males and females were tested for male mating behavior following androgen treatment in adulthood. All groups exhibited a similar periodicity of male copulatory behavior (mount-bouts); however, postpubertally castrated males showed a higher frequency of intromission and ejaculatory patterns, while postpubertally castrated females exhibited fewer copulatory events per mount-bout than either neonatally castrated males or androgenized females. It was concluded that there is an identity of the temporal patterning of male mating behavior that is unaffected by either genetic sex or neonatal hormonal milieu; but, super-imposed upon this fundamental rhythm there are hormonally determined differences in copulatory performance.
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