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  • Title: [Effect of progesterone on male and female sex behavior induced by steroid hormones in adult ovariectomized ewes].
    Author: Fabre-Nys C.
    Journal: C R Seances Acad Sci D; 1979 Dec 17; 289(16):1319-22. PubMed ID: 120792.
    Abstract:
    Ovariectomized adult Ewes daily treated with I/M injections of testosterone propionate (10 mg/day) or oestradiol benzoate (200 microgram/day) show male-like sexual behaviour and simultaneously a permanent female receptivity. Additional daily treatment with 100 mg of progresterone results in a rapid decrease in male sexual responses both when Ewes are treated with testosterone and with oestradiol. No effect is observed on the female receptivity. Cyproterone acetate (100 mg/day) given to Ewes in addition to daily injection of testosterone propionate (10 mg/day) has effects similar to those of progesterone. These results show that progesterone has antiandrogen and antioestrogen properties and that this hormone administered at high doses is able to inhibit male activity.
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