Amniotic fluid alpha-fetoprotein levels in Down syndrome.
D000653:Amniotic Fluid / Q000032:analysis*; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007621:Karyotyping; D011247:Pregnancy; D000509:alpha-Fetoproteins / Q000032:analysis*
D000509:alpha-Fetoproteins