Anencephaly and maternal age.
D000293:Adolescent; D000328:Adult; D000757:Anencephaly / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D009518:New York; D011247:Pregnancy; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013997:Time Factors