In the context of pregnancy, the role of DNA testing is to uncover genetic disease in a fetus. (An additional bonus for parents is learning the baby's sex, which many are eager to know.) Unfortunately, genetic testing in pregnancy often isn't as conclusive or uncomplicated as the DNA testing police use to determine whether someone was at the scene of a crime.
A recent study shows that more extensive testing can be done via a maternal blood test earlier in pregnancy than the tests we currently have access to. This means that expectant parents will soon be able to know a lot more about their baby's genome early on, potentially identifying many genetic diseases during the first trimester of pregnancy.
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