_____ refers to a procedure in which a small amount of tissue from the placenta is analyzed for genetic abnormalities.

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The procedure being described is called chorionic villus sampling (CVS), where a small amount of tissue from the placenta is collected and analyzed for genetic abnormalities. Amniocentesis also involves collecting a sample of fetal cells for genetic analysis, but it involves collecting amniotic fluid instead of tissue from the placenta. Ultrasound, CT scan, and fetal magnetic resonance imaging are all imaging techniques used to visualize the developing fetus, but they do not involve collecting tissue samples for genetic analysis.

_____ Refers to a Procedure in Which a Small Amount