Eight children conceived using mitochondrial donation, a type of IVF designed to prevent the inheritance of serious genetic diseases, are reportedly thriving. The children, who were at risk of inheriting mitochondrial disorders from their mothers, have all met their expected developmental milestones. This outcome provides further evidence supporting the safety and efficacy of mitochondrial donation as a reproductive technology. The procedure involves replacing the mother's mitochondria, which can carry disease-causing mutations, with healthy mitochondria from a donor egg.