Should ultrasound be used to estimate gestational age in the screening and antenatal diagnosis of open neural tube defects?
D000649:Amniocentesis; D005260:Female; D005865:Gestational Age; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography