Twinship as handicap: fact or fiction?
D002648:Child; D002657:Child Development; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D010553:Personality Development; D011247:Pregnancy; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*