What is the risk of complications associated with chorionic villus sampling (CVS)?

Chorionic villus sampling (CVS) is a prenatal diagnostic procedure used to detect certain genetic conditions in the fetus. Understanding the risk of complications is crucial in genetic counseling, as it informs expectant parents about potential risks associated with the procedure.

The accepted risk of complications, particularly miscarriage, associated with CVS is approximately 1 in 100. This statistic reflects findings from multiple studies that have assessed the safety profile of CVS when performed by skilled clinicians. It is essential for genetic counselors to convey this information to prospective parents, as it helps them weigh the benefits of early diagnosis against the risks associated with the procedure.

In contrast, the other options present risks that are either lower or higher than the generally accepted statistic. A risk of 1 in 200 would imply a significantly lower complication rate, which is not consistent with the majority of clinical data. Rates of every 150 or 50 do not align with the standard estimates reported in the literature, thus underscoring the importance of understanding the accepted figures on CVS complications. Providing accurate information helps ensure informed decision-making for patients considering this testing method.