title: Biological aspects of homosexuality.
mesh_terms: D000328:Adult; D001348:Aversive Therapy; D001921:Brain / Q000196:embryology; D005260:Female; D006716:Homosexuality; D006801:Humans; D008297:Male; D011247:Pregnancy; D012733:Sex Differentiation; D014430:Twins, Monozygotic