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High-risk pregnancy: Know what to expect

Other genetic tests

Your healthcare professional might suggest amniocentesis or chorionic villus sampling (CVS). These tests can help find genetic conditions. They also can be used to confirm results from cell-free DNA screening.

  • Amniocentesis. During amniocentesis, a sample of the fluid that surrounds and protects a fetus during pregnancy is taken from the uterus. The medical term for that fluid is amniotic fluid. Usually done after week 15 of pregnancy, the test can identify some genetic conditions. It also can find serious problems of the brain or spinal cord. Those conditions are called neural tube defects.
  • CVS. During CVS, a sample of cells is taken from the placenta. It's usually done between weeks 10 and 13 of pregnancy.