title: Diagnosis of closed neural tube defects by ultrasound in second trimester of pregnancy.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis; D014463:Ultrasonography