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High-risk pregnancy: Know what to expect

Cell-free DNA screening

This test sometimes is called cfDNA. It uses a blood sample from you to provide the healthcare team with your DNA and the fetus's DNA. A small amount of DNA from the fetus goes into a pregnant person's blood stream during pregnancy. Through the blood sample, the fetus's DNA is checked to see if there's a higher chance of certain chromosome problems. If so, those problems could signal a genetic condition.