Those designer babies everyone is freaking out about – it's not likely to happen
- Written by A Cecile JW Janssens, Research Professor of Epidemiology, Emory University

When Adam Nash was still an embryo, living in a dish in the lab, scientists tested his DNA to make sure it was free of Fanconi anemia, the rare inherited blood disease from which his sister Molly suffered. They also checked his DNA for a marker that would reveal whether he shared the same tissue type....
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