Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption
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genetic testing
The CRISPR enzyme (green and red) binds to a stretch of double-stranded DNA (purple and red), preparing to snip out the faulty part. Illustration courtesy of Jennifer Doudna/UC Berkeley hide caption
Vera Wojtesta was one of 300 babies flagged by New York's newborn screening program as at risk of having life-threatening Krabbe disease. Ben Shutts/Courtesy of the Wojtesta family hide caption
Slides containing DNA sit in a bay waiting to be analyzed by a genome sequencing machine. David Paul Morris/Bloomberg via Getty Images hide caption