koorionbiopsia

Koorionbiopsia, also known as chorionic villus sampling (CVS), is a prenatal diagnostic technique used to detect chromosomal abnormalities and certain genetic disorders in a developing fetus. This procedure involves obtaining a small sample of tissue from the placenta, which is called the chorion. The chorion contains villi, which are finger-like projections that share the same genetic material as the fetus.

The procedure is typically performed between the 10th and 13th week of pregnancy. There are two main methods for obtaining the sample: transcervical and transabdominal. In the transcervical approach, a thin catheter is inserted through the cervix into the uterus to collect the placental tissue. In the transabdominal approach, a needle is inserted through the abdominal wall into the uterus to retrieve the sample. Both methods are guided by ultrasound to ensure accuracy and minimize risk.

The collected chorionic villus tissue is then sent to a laboratory for analysis. Geneticists examine the chromosomes to identify conditions such as Down syndrome, cystic fibrosis, and Tay-Sachs disease. The results of a CVS are usually available within one to two weeks.

While CVS can provide valuable information about the fetus's genetic health, it does carry a small risk of complications, including miscarriage. Therefore, it is usually offered to pregnant individuals who have a higher risk of chromosomal or genetic disorders, such as those with a family history of such conditions or who are of advanced maternal age. The decision to undergo CVS is a personal one and should be discussed thoroughly with a healthcare provider.