CVS isn’t a routine test. But your doctor may recommend it if your chances of having a baby with a genetic condition or birth defect are higher than average. Even though CVS can find certain problems, it can’t guarantee that your baby will be born healthy. No test can do that.

CVS can cause miscarriage, which is the loss of a pregnancy in the first 23 weeks. The chance of miscarrying after CVS is up to 1 in 100. This means that 1 in100 pregnancies will miscarry after having CVS.

The main advantage of CVS over amniocentesis is that it is performed much earlier in pregnancy, at 10 to 13 weeks, rather than 15 to 20 weeks. A disadvantage is that neural tube defects, such as spina bifida, can’t be detected.

A CVS test has some risks. You’ll have to weigh the benefit of knowing if something might be wrong with your baby against the risks of having the test. There is a small chance that the test may cause you to have a miscarriage. This means that you could lose your baby after you have the test.

Counselors should discuss the risk for miscarriage attributable to both procedures: the risk from amniocentesis at 15-18 weeks’ gestation is approximately 0.25%- 0.50% (1/400-1/200), and the miscarriage risk from CVS is approximately 0.5%-1.0% (1/200-1/100).

Is CVS painful? CVS is usually described as being uncomfortable, rather than painful. In most cases, an injection of local anaesthetic will be given before transabdominal CVS to numb the area where the needle is inserted, but you may have a sore tummy afterwards.

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Compared with a second trimester amniocentesis, transcervical CVS carries a higher risk of pregnancy loss, although the results are quite heterogeneous. One study compared transabdominal CVS with second trimester amniocentesis and found no significant difference in the total pregnancy loss between the two procedures.

Amniocentesis is safer than CVS. The incidence of miscarriage following amniocentesis is 0.5% while it is 5% following CVS. We use CVS in the first trimester and amniocentesis in the second trimester, so the indications are different.

Amniocentesis is safer than CVS. The incidence of miscarriage following amniocentesis is 0.5% while it is 5% following CVS.

Although CVS is considered to be a safe procedure, it is recognized as an invasive diagnostic test that does pose potential risks. Miscarriage is the primary risk related to CVS occurring 1 out of every 100 procedures.

What Are the Risks of CVS? CVS may carry a slightly higher risk of miscarriage than amniocentesis, because the procedure is done in early pregnancy. Infection may also occur. Rare cases of defects in baby’s fingers or toes have been reported, especially when CVS was done before nine weeks.

Miscarriage is the primary risk related to CVS occurring 1 out of every 100 procedures. Following the procedure, the mother may experience one or more of the following side effects: Contact your healthcare provider if these symptoms remain or get worse. According to the Mayo Clinic, there is a 1% chance of getting false positive results.

Before you decide to have chorionic villus sampling (CVS), you’ll be told about the risks and possible complications. CVS carries a risk of miscarriage, which is the loss of a pregnancy in the first 23 weeks. The risk of miscarriage after CVS is estimated to be up to 1 in 100.