Ultrasound and a neural tube screening program in North Carolina.
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000175:diagnosis*; D009657:North Carolina; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000097:blood
D000509:alpha-Fetoproteins