Leydig cells.
D000818:Animals; D002784:Cholesterol / Q000096:biosynthesis; D003267:Contraception; D006801:Humans; D007985:Leydig Cells / Q000378:metabolism / Q000502:physiology; D008297:Male; D008322:Mammals; D011284:Pregnenolone / Q000378:metabolism; D012109:Research Support as Topic; D013091:Spermatogenesis; D013739:Testosterone / Q000378:metabolism; D014659:Vasectomy
D013739:Testosterone; D011284:Pregnenolone; D002784:Cholesterol