New prenatal blood tests for genetic abnormalities such as Down syndrome are reshaping care for expectant mothers, but their rapid rollout has raised fears that poorly understood results could lead to confusion among patients and doctors managing high-risk pregnancies.   Four ... [More]

Non-invasive procedure could make prenatal testing easier, but it comes with ethical problems.   Until last week, scrutinizing a fetus's DNA for indications of genetic abnormalities meant tapping into the mother's womb with a needle. Now there's a test that can do it using a small sampl... [More]