Abstract
Adult intact and spayed female rats were treated daily with testosterone propionate (TP) and tested for male and female behavior on alternate days for a period of 3 weeks. Histology of the ovaries, which were removed from the intact animals after the last behavioral test, revealed that TP had arrested the ovary in either a follicular or corpora luteal stage. The behavioral data, grouped according to the histological finding, indicated that the corpora lutea group showed as much male behavior as the castrate group and significantly more than the follicle group. The castrate group showed no female behavior while both of the intact groups showed constant low levels of female receptivity. However, the number of lordosis responses emitted by the corpora lutea group was significantly higher than for the follicle group. It was concluded that TP's behavior eliciting effectiveness in the intact adult female rat is dependent on the stage of the estrous cycle in which it arrests the ovary.
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