Researchers seeking a safer way to detect Down syndrome in a fetus say combining blood and ultrasound tests from the first and second trimesters would be more accurate than standard screenings and reduce the need for riskier testing.\r

Researchers seeking a safer way to detect Down syndrome in a fetus say combining blood and ultrasound tests from the first and second trimesters would be more accurate than standard screenings and reduce the need for riskier testing.\r