A new kind of blood test can screen for many cancers — as some pregnant people learn

December 23, 2022
When women get a blood test during pregnancy that looks at free-floating DNA, they expect it to tell about the health of the fetus. But the test sometimes finds signs of cancer in the mother.

Testing pregnant people's blood to look at free-floating DNA can tell doctors about the health of the fetus. But these tests sometime turn up DNA that might be shed by cancerous cells.

(Image credit: Isabel Seliger for NPR)



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