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  • Title: Induction of ear wiggling in the estrous female rat by gonadectomized rats treated with androgens and estrogens.
    Author: Vreeburg JT, Ooms MP.
    Journal: Horm Behav; 1985 Sep; 19(3):231-6. PubMed ID: 4054849.
    Abstract:
    Intact and gonadectomized male and female rats treated with estradiol and/or dihydrotestosterone were introduced into the cage of estrous female rats. For 3 min the number of periods with ear wiggling displayed by the estrous female and the total duration of the periods with ear wiggling were recorded. It was found that estrous females showed about twice as much ear wiggling in the presence of intact males as in the presence of gonadectomized male and female rats. However, gonadectomized male and female rats treated with dihydrotestosterone induced as much ear wiggling as intact males did. In contrast, administration of estradiol to the gonadectomized stimulus rats did not affect the rate of ear wiggling of the estrous females. Estrous females showed the lowest rate of ear wiggling in the presence of intact female rats. It has been suggested that dihydrotestosterone-treated male and female rats have an odor which sexually excites estrous female rats.
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