[Fertilization capability of the aged male].
D000368:Aged; D004822:Epididymis / Q000502:physiology; D005306:Fertilization; D006801:Humans; D006913:Hydroxysteroid Dehydrogenases / Q000378:metabolism; D007985:Leydig Cells / Q000201:enzymology; D008297:Male; D013091:Spermatogenesis; D013094:Spermatozoa / Q000502:physiology; D013737:Testis / Q000502:physiology
D006913:Hydroxysteroid Dehydrogenases