CVS is a prenatal test that serves the purpose of detecting the birth defects, genetic disorders and several other problems that occur during pregnancy. In order to execute the test, the chorionic villi which are the small parts of the placenta are taken. These are formed from the egg that is being fertilized, hence they constitute the same genes as that of the baby.
The abnormalities like Down syndrome, cystic fibrosis, sickle cell anemia etc. can be identified by CVS. The chromosomal defects can be diagnosed with 98% accuracy by the help of it. Moreover, the sex of the fetus is also determined by performing CVS.
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