title: Letter: Chromosome polymorphism and prenatal diagnosis.
mesh_terms: D000653:Amniotic Fluid / Q000166:cytology; D002869:Chromosome Aberrations / Q000175:diagnosis* / Q000235:genetics; D025063:Chromosome Disorders; D002900:Chromosomes, Human, 1-3; D002902:Chromosomes, Human, 16-18; D002906:Chromosomes, Human, 6-12 and X; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic; D011247:Pregnancy; D011296:Prenatal Diagnosis