Writes Bonnie Rochman on TIME:
Researchers at the University of Washington have sequenced the entire genome of a fetus. The scientific advance could help detect certain diseases in the womb, but some experts worry that the trove of genetic information may prove more scary and overwhelming than useful.
Suspended in the blood of a pregnant woman — along with some added information from a dad-to-be’s saliva — lurks enough fetal DNA to map out an unborn baby’s entire genetic blueprint.
It may sound like something conjured by Jules Verne, but it happened at the University of Washington: a professor and his graduate student used DNA samples from the parents of a baby boy who was still in utero and reconstructed his entire genetic makeup from A to Z.
The account, published in Science Translational Medicine, takes prenatal testing to new heights, promising a motherlode of genetic information about a child who had not even been born — along with a corresponding trove of data that even experts don’t yet know how to interpret…