New DNA blood test may spot fetal disorders more accurately in first trimester

This study looked at whether a blood test that analyzes fetal DNA (cell-free DNA) can better detect certain genetic conditions—like Down syndrome (trisomy 21), Edwards syndrome (trisomy 18), Patau syndrome (trisomy 13), and 22q11.2 deletion syndrome—during the first trimester of pregnancy. Researchers compared this newer test to the standard combined screening (ultrasound and blood markers) in about 1,000 pregnant women. The goal was to see how often the test gives a false positive or no result, not to treat or prevent any condition.