title: Studies on the relationship between plasma testosterone levels and human sexual activity.
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D003075:Coitus; D004542:Ejaculation; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D008418:Masturbation; D009948:Orgasm; D012725:Sexual Behavior; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D007986:Luteinizing Hormone