Mrs. Robertson is having a prenatal test in which cells are extracted from the placenta. This test is

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The test Mrs. Robertson is having is chorionic villus sampling (CVS), which involves extracting cells from the placenta for prenatal testing. Amniocentesis involves withdrawing amniotic fluid, fetoscopy involves direct visualization of the fetus, and ultrasound and sonography are imaging techniques that do not involve cell extraction.

Mrs Robertson Is Having a Prenatal Test in Which Cells