title: False-negative finding on chorionic villus sampling.
mesh_terms: D000328:Adult; D001706:Biopsy; D002478:Cells, Cultured; D002824:Chorionic Villi / Q000648:ultrastructure*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D007621:Karyotyping; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*