title: Terminal rearrangement of chromosomes 21 detected in amniotic fluid, resulting in a trisomy 21.
mesh_terms: D000328:Adult; D000649:Amniocentesis; D000653:Amniotic Fluid / Q000166:cytology*; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure*; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D011247:Pregnancy