Anencephalus and spina bifida.
D000757:Anencephaly / Q000453:epidemiology* / Q000235:genetics; D004739:England; D005260:Female; D005602:France; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008404:Massachusetts; D009660:Northern Ireland; D012237:Rhode Island; D012606:Scotland; D016135:Spinal Dysraphism / Q000453:epidemiology* / Q000235:genetics; D014852:Wales