Effectiveness of prenatal screening.
D000013:Congenital Abnormalities / Q000175:diagnosis*; D004314:Down Syndrome / Q000175:diagnosis; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis*; D006801:Humans; D009436:Neural Tube Defects / Q000175:diagnosis; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013661:Tay-Sachs Disease / Q000175:diagnosis; D013789:Thalassemia / Q000175:diagnosis