Which is a medical test that involves removing and testing a small piece of the developing placenta? chorionic villus sampling amniocentesis preeclampsia ultrasound

chorionic villus sampling is removing a peice of the placenta.

amniocentesis is removing amniotic fluid.

Ultrasound is listening for a heartbeat.

and so on

The answer you're looking for is : Chorionic villus sampling  

(( The CVS is a prenatal test in which a piece of the developing placenta is removed & tested for inherited disorders. ))  

- hope this helps (^Q^)