Screening for neural-tube defects.
D000653:Amniotic Fluid / Q000032:analysis; D000757:Anencephaly / Q000175:diagnosis*; D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D037841:Pregnant People; D011296:Prenatal Diagnosis; D016135:Spinal Dysraphism / Q000175:diagnosis*; D000509:alpha-Fetoproteins / Q000032:analysis
D000509:alpha-Fetoproteins