These companies help parents try to pick their babies' traits. Experts are wary
Rob SteinNPR News

Prospective parents can now pick embryos based on risk predictions for thousands of diseases and odds for specific traits. But should they? (Image credit: Kate Medley for NPR)
Prospective parents can now pick embryos based on risk predictions for thousands of diseases and odds for specific traits. But should they?
(Image credit: Kate Medley for NPR)
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