Prenatal screening for neural tube defects.
D000649:Amniocentesis; D000757:Anencephaly / Q000175:diagnosis; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016136:Spina Bifida Occulta / Q000175:diagnosis; D014481:United States