Final answer:
Chorionic Villus Sampling (CVS) is associated with a risk of fetal loss, estimated to be between 0.5% to 1%. It's essential for patients to weigh the risks and benefits with their healthcare provider.
Step-by-step explanation:
The student is inquiring about the risk of fetal loss associated with Chorionic Villus Sampling (CVS), which is a prenatal test where a sample of chorionic villi is removed from the placenta for testing. The procedure carries a risk of fetal loss, which varies depending on the source, but is generally considered to be around 0.5% to 1%. It's important for prospective parents to discuss the risks and benefits of the procedure with their healthcare provider, considering factors like maternal age, fetal viability, and the potential detection of chromosomal abnormalities such as trisomy 21.