Doctors in China have become the first to report details about a transplant of a genetically modified pig liver into a human.

In the U.S. last year, surgeons at the University of Pennsylvania attempted that sort of “bridge” support by externally attaching a pig liver to a brain-dead human body to filter blood, much like dialysis for failing kidneys. U.S. pig developer eGenesis is studying that approach.

A Chinese woman is the third person in the world living with a gene-edited pig kidney, and three weeks after surgery, she’s doing well.