Genetics of anencephaly and spina bifida?
D000757:Anencephaly / Q000453:epidemiology / Q000235:genetics*; D001722:Birth Order; D000013:Congenital Abnormalities / Q000453:epidemiology; D004200:Diseases in Twins; D004781:Environmental Exposure; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D012237:Rhode Island; D012737:Sex Factors; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*; D013997:Time Factors