A New Hampshire man fought for the chance at a pig kidney transplant, spending months getting into good enough shape to be part of a small pilot study of a highly experimental treatment.

Mass General Brigham has announced the successful completion of another gene-edited pig kidney transplant, the first of a three-person pilot study.

FDA clears United Therapeutics for human trials of pig-to-human kidney transplants. Trial involves gene-edited pig kidneys for patients with end-stage renal disease. Study aims to provide alternative for 500,000 Americans on dialysis.