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

The transplant came after about a decade of earlier studies and transplants by Wang and his team of gene-edited organs from pigs into monkeys, including a pig heart, kidney, cornea, and bone. The group also performed a skin transplant using gene-edit pig skin into a person with severe burns.

Over 10 days, the porcine liver produces bile and porcine albumin, maintains stable blood flow, and shows no signs of rejection after transplantation into a brain-dead patient.