Sexual development in childhood and its problems.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D005260:Female; D006716:Homosexuality; D006801:Humans; D008297:Male; D008418:Masturbation; D010262:Paraphilic Disorders / Q000209:etiology / Q000628:therapy; D010287:Parent-Child Relations; D011606:Psychosexual Development; D012736:Sex Education; D012725:Sexual Behavior