IndiaParenting.com - Chorionic Villi Sampling (CVS)

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Chorionic Villi Sampling (CVS)

What is chorionic villi sampling

Chorionic Villi Sampling (CVS) is a test that gives a complete picture of the genetic makeup of the developing foetus. This procedure involves taking a sample of the chorion, a membrane surrounding the foetus, either via the vagina and cervix, or through a needle inserted in the abdominal wall. Since the sample is taken directly from the foetus, its examination can help in identifying any defects in the baby.

Which diseases can be identified with CVS

CVS is useful in detecting disorders like Tay-Sachs, sickle-cell anaemia, most types of cystic fibrosis, the thalassaemias, and Down's syndrome.

What are the advantages of CVS over amniocentesis

The advantage of CVS over amniocentesis is that it can be performed as early as the tenth week of pregnancy and gives results within one or two weeks. Thus, doctors can identify genetic defects earlier on in the pregnancy. Amniocentesis can only be conducted around the 16th week of pregnancy. The results of CVS are also available earlier and sometimes, CVS can be performed when there is not enough amniotic fluid.

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