Two US biotech companies say the Food and Drug Administration has cleared them to conduct clinical trials of their gene-edited pig kidneys for human transplants. Pigs have emerged as ideal donors: they grow quickly,

The first clinical trials using organs from genetically modified pigs offer hope to patients with kidney failure, who face a long wait for human organ transplants.

The U.S. Food and Drug Administration has approved the first-ever clinical trials testing pig kidney transplants in people with kidney failure, marking a major step forward in cross-species transplantation.