Origins of homosexuality.
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D005826:Genetics, Medical; D006716:Homosexuality / Q000453:epidemiology* / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010287:Parent-Child Relations; D012961:Sociology