Recent advances in screening for neural tube defects and Down's syndrome.
D004314:Down Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008403:Mass Screening; D009436:Neural Tube Defects / Q000175:diagnosis / Q000453:epidemiology*; D011247:Pregnancy; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000378:metabolism
D000509:alpha-Fetoproteins