title: False-negative finding on chorionic villus sampling.
mesh_terms: D001706:Biopsy; D002824:Chorionic Villi / Q000473:pathology*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009030:Mosaicism; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000592:standards*; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*