Intelligence and birth weight in identical twins.
D000293:Adolescent; D001741:Black or African American; D001722:Birth Order; D001724:Birth Weight; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D007360:Intelligence; D007361:Intelligence Tests; D008297:Male; D009420:Nervous System / Q000254:growth & development; D009460:Neurologic Examination; D011247:Pregnancy; D012923:Social Class; D014427:Twins; D044465:White People