title: Maternal serum screening for neural tube defects and Down's syndrome.
authors.forename: E F
authors.initials: EF
authors.lastname: Robertson
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis