Studies of 17-ketosteroid levels and of seminal values were made on 57 [male][male] aged 15-49 yrs. Significant correlation apparently existed between age of patients and 17-ketosteroid excretion, and between occurrence of decreased 17-ketosteroid levels and deficient seminal values. No correlation between age of patients and seminal values, or between the occurrence of high 17-ketosteroid levels and normal seminal values were apparent.