New era of human embryo gene editing begins

News report highlights one example, but scientists say many experiments now going on

human embryo

EDITS UNDER WAY  Researchers in Sweden have begun editing genes in viable early human embryos (four-cell stage, shown). Others are probably doing the experiments behind closed doors, scientists say.

NinaSes/Wikimedia Commons (CC BY-SA 4.0)

A Swedish scientist is gene editing healthy human embryos, and he is probably not alone, researchers say.