Cytogenetic diagnosis of Down's syndrome in utero.
D000032:Abortion, Therapeutic; D000653:Amniotic Fluid / Q000166:cytology*; D002869:Chromosome Aberrations; D046508:Culture Techniques; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D007621:Karyotyping; D008722:Methods; D010375:Pedigree; D011247:Pregnancy