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Annual blood plasma levels of testosterone, 5 alpha-dehydrotestosterone and dehydroepiandrosterone were measured in hamadryas baboon males using radioimmunoassay. Fluctuations characterized by a decrease in testosterone and 5 alpha-dehydrotestosterone concentrations in spring and an increase in their levels in autumn have been established. Dehydroepiandrosterone level was characterized by two minimal points--at the beginning of the year and in August. The following average annual levels of androgens have been determined: 22.5 nmol/l for testosterone; 4.7 nmol/l for 5 alpha-dehydrotestosterone; 19.0 nmol/l for hydroepiandrosterone. 相似文献