The risk of miscarriage after undergoing chorionic villus sampling, or CVS, to detect birth defects is lower than previously thought and essentially carries the same risk as the more commonly used ...

Chorionic villus sampling (CVS) is a prenatal test used to detect birth defects, genetic diseases, and other problems during pregnancy. During the test, a small sample of cells (called chorionic villi ...

During pregnancy, the fetus is surrounded by amniotic fluid, a substance much like water. Amniotic fluid has live fetal cells and other things, such as alpha-fetoprotein (AFP). They provide important ...