Neural tube defects.
D000650:Amnion / Q000000981:diagnostic imaging; D000653:Amniotic Fluid / Q000378:metabolism; D005260:Female; D006801:Humans; D009436:Neural Tube Defects / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011859:Radiography; D000509:alpha-Fetoproteins / Q000378:metabolism
D000509:alpha-Fetoproteins