Neural tube defects.
D000757:Anencephaly / Q000453:epidemiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008002:Libya; D008297:Male; D009436:Neural Tube Defects / Q000453:epidemiology*; D016136:Spina Bifida Occulta / Q000453:epidemiology