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Overview
To take a chorionic villus sample, your surgeon either enters the uterus through the cervix (transcervical procedure) or through the abdomen (transabdominal procedure). The fetus' position in the uterus determines which procedure the surgeon uses.
Review Date 12/3/2020
Updated by: LaQuita Martinez, MD, Department of Obstetrics and Gynecology, Emory Johns Creek Hospital, Alpharetta, GA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.