For the first time, scientists have pieced together the entire DNA sequence of an 18-week-old fetus without having to use any invasive tests that could result in a miscarriage. It’s an advance that offers a glimpse of the future of prenatal testing. Andrew Pollack covers bio technology for our partner the New York Times, and Dr. Jonathan Moreno is a bioethicist and professor of medical ethics at the University of Pennsylvania.
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