Endocrine testicular secretion in aging males.
D000368:Aged; D000375:Aging; D000728:Androgens / Q000097:blood / Q000378:metabolism*; D004967:Estrogens / Q000097:blood / Q000378:metabolism*; D006801:Humans; D008297:Male; D013737:Testis / Q000254:growth & development / Q000378:metabolism*
D000728:Androgens; D004967:Estrogens