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  • Title: Effects of anti-estrogens on testosterone stimulated male sexual behavior and peripheral target tissues in the castrate male rat.
    Author: Luttge WG.
    Journal: Physiol Behav; 1975 Jun; 14(6):839-46. PubMed ID: 1187841.
    Abstract:
    In the first experiment castrated male rats were injected daily with either vehicle or 800 mug testosterone together with either 6 hr pretreatment or concurrent treatment with the anti-estrogens CI-628 (4 mg) or MER-25 (20 mg). The only treatment found to significantly reduce male copulatory behavior was concurrent treatment with CI-628. Anti-estrogen treatment was also found to slightly reduce body weights, increase seminal vesicle weights in response to testosterone and to have no significant effects on androgen stimulated increases in penis weight and length. In the second experiment castrated male rats were injected daily with either vehicle or 500 mug testosterone together with 2.5 mg injections of CI-628 given 6 hr before and concurrent with the androgen injections. The anti-estrogen treatment was found to markedly inhibit the desplay of male sexual behavior, to reduce body weights, and to stimulate seminal vesicle weights. Penile weights and lengths were again not effected by the anti-estrogen therapy. These results were interpreted as supporting the theory that testosterone stimulated male sexual behavior in the rat following its aromatization to estradiol in the brain.
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