Chorion villus samplingcan provide information about the genetic characteristics of the baby. This test, also known as CVS, is among the prenatal tests performed during pregnancy. The test can be done between the 9th and 14th weeks of pregnancy. This test is also commonly known as the Down syndrome screening test. However, the test can also detect other genetic diseases.
Why is Chorionic Villus Sampling (CVS) Done?
This test, also known as chorionic villusbiopsy, is performed on the baby. It is done to determine whether there is any genetic disorder or chromosomal anomaly. Generally, doctors request this test because of a result obtained in routine screening tests.
In addition, mothers who have had genetic problems in their previous pregnancies or births are also asked to have this test. In many cases, a history of genetic disorder or chromosomal anomaly causes a similar history to occur in subsequent pregnancies.
Another situation where chorionic villus samplingtest is requested is when the mother is 35 years of age or older. are pregnancies. The risks associated with pregnancy increase as the mother's age increases. These include genetic disorders.
In addition, people with a family history of genetic disorders are also asked to have the test. Having a chromosomal anomaly in the family does not mean that the fetus will have an anomaly, but genetic predispositions increase the risk.
How is Chorionic Villus Sampling (CVS) Done?
During the test, a sample is taken from the chorionic villus with the help of a needle. Ultrasound is used during sample collection. During the procedure, it is entered through the abdomen or cervix. The entry method is determined by the doctor to keep the patient's comfort level at the highest level.
What are the Risks of Chorionic Villus Sampling (CVS)?
The biggest risk of this test is shown to be low. Similar to amniocentesis, the test carries about a 0.25% risk of miscarriage. Another risk, although rare, is Rh sensitization. If the mother's blood is Rh negative and the baby's blood is Rh positive, mixing of the baby's blood with the mother's blood during the procedure may cause blood problems. In addition, as with any intervention, there is a risk of infection.
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