Evaluation of 'infant at risk' registers.
D000293:Adolescent; D001720:Birth Injuries; D001722:Birth Order; D001724:Birth Weight; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D006233:Persons with Disabilities; D004519:Education, Special; D004739:England; D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D008423:Maternal Age; D008499:Medical Records; D011247:Pregnancy; D011996:Records; D012042:Registries; D012737:Sex Factors; D012959:Socioeconomic Factors