title: Prenatal screening for Down syndrome and neural tube defects.
authors.forename: R D
authors.initials: RD
authors.lastname: Smart
authors.forename: M
authors.initials: M
authors.lastname: Marx
mesh_terms: D000328:Adult; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005820:Genetic Testing; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011296:Prenatal Diagnosis