title: The causes of mental retardation.
authors.affiliation: Harvard Medical School, Boston MA.
authors.forename: A C
authors.initials: AC
authors.lastname: Crocker
mesh_terms: D000013:Congenital Abnormalities / Q000209:etiology; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology* / Q000235:genetics; D011247:Pregnancy; D011248:Pregnancy Complications