Screening for neural-tube defects.
D000757:Anencephaly / Q000097:blood / Q000175:diagnosis*; D002490:Central Nervous System / Q000002:abnormalities / Q000196:embryology; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016136:Spina Bifida Occulta / Q000097:blood / Q000175:diagnosis*; D000509:alpha-Fetoproteins / Q000032:analysis
D000509:alpha-Fetoproteins