Researchers in the UK reported the birth of eight healthy babies following mitochondrial donation and pronuclear transfer, a technique involving DNA from three people to prevent mitochondrial genetic diseases. The babies, born to seven women at high risk of transmitting mitochondrial DNA disorders, show no signs of disease and are developing normally. This groundbreaking IVF-based approach has been authorized in the UK since 2015 and involves transferring nuclear DNA into donor eggs with healthy mitochondria. The results, published in The New England Journal of Medicine, highlight the potential for this technology to prevent transmission of debilitating mitochondrial diseases.