Prenatal diagnosis of Down's syndrome.
D000032:Abortion, Therapeutic; D000328:Adult; D000653:Amniotic Fluid / Q000032:analysis; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D007621:Karyotyping; D011247:Pregnancy