Season of birth and degree of mental retardation: failure to confirm a relationship.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000523:psychology*; D007743:Labor, Obstetric; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012621:Seasons