America is experiencing a boom in biological fortune-telling. Doctors can now scan the genes of a fetus using only a drop of the mother’s blood, testing for hundreds of known mutations, including Down syndrome. Soon they’ll be able to detect a growing list of rare mutations—almost none of them treatable—and predict an embryo’s risk of more common ailments like diabetes, cancer, and heart disease
To Catch a Killer Gene: Sisters Race to Stop Mystery Disease
