Changes in the incidence of neural-tube defects.
D000757:Anencephaly / Q000453:epidemiology*; D004677:Encephalocele / Q000453:epidemiology*; D004739:England; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D012606:Scotland; D016135:Spinal Dysraphism / Q000453:epidemiology*