Factors associated with mental retardation in children aged 21/2-7 years.
D002648:Child; D002675:Child, Preschool; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology*; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D011248:Pregnancy Complications; D012306:Risk