title: Possible source of error in prenatal diagnosis via chorionic villus biopsy.
mesh_terms: D001706:Biopsy; D002824:Chorionic Villi / Q000473:pathology*; D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D010920:Placenta / Q000473:pathology*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*