title: Primary leydig cell failure with preservation of spermatogenesis.
mesh_terms: D006062:Gonadotropins / Q000097:blood; D006801:Humans; D007985:Leydig Cells / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D013091:Spermatogenesis; D013739:Testosterone / Q000172:deficiency
chemical_list: D006062:Gonadotropins; D013739:Testosterone