Chorionic villus sampling. What is it? It is a method of prenatal diagnosis that involves taking a sample of trans-abdominal chorionic villus sampling (or trans-vaginal), under ultrasound guidance.
The villi consist of cells of fetal origin. The examination of chorionic villi is carried out with a suction cannula via the vagina.
When doing CVS?
The withdrawal you can do between 9 and 12th week.
What is CVS?
Used to make the diagnosis of fetal chromosomal problems, such as Down syndrome. Do not look for genetic disorders if there is an accurate indication, as previous cases in a family of a certain disease. This is because there are thousands of genetic diseases and it is not possible to test them all.
The earliness of the levy in relation to amniocentesis allows expectant mothers to know if her pregnancy there are serious fetal abnormalities and if applicable to terminate the pregnancy.
Who’s recommended CVS?
The examination is offered to patients at high risk of chromosomal abnormalities such as Chorionic Villus Sampling:
- maternal age above 35 years;
- increased risk of chromosomal pathology according to nuchal translucency ultrasound;
- previous child with chromosomal abnormality;
- parent carriers of chromosomal abnormalities;
- Also, if there is a risk for some hereditary diseases (alpha and Beta thalassemia, hemophilia A and B, cystic fibrosis, etc.) can be performed DNA analysis.
What risks does the CVS?
Being a so-called invasive examination can result in CVS risk evolution of pregnancy. You can indeed estimate that there may be a risk of miscarriage equal to 1%.