title: Maternal serum screening.
authors.forename: S
authors.initials: S
authors.lastname: Lofsky
mesh_terms: D000649:Amniocentesis; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005820:Genetic Testing / Q000379:methods*; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000097:blood / Q000175:diagnosis*; D011296:Prenatal Diagnosis / Q000379:methods*; D015203:Reproducibility of Results