Abstract
Graded amounts of estradiol benzoate (ranging from 0.48 to 500 μg/kg) were administered to ovariectomized, adrenalectomized female rats in order to analyze the effects of estrogen on the qualitative and quantitative aspects of female reproductive behavior in this species. The interaction of hormone dose and copulatory stimulation was also investigated. In this study, soliciting behavior and lordosis responses were broken down into subcategories. There were three main results. First, it was found that the responses were hierarchically arranged such that, with increasing doses of hormone, the common elements of sexual responding appeared in the same order across individual females. Second, the chronic endocrine background of the female influenced the degree of her receptivity following an acute injection of estrogen. Third, repeated elicitation of lordosis by copulatory stimulation facilitated the subsequent occurrence of lordosis.
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