UK researchers announced the birth of eight infants conceived through mitochondrial donation using pronuclear transfer, preventing transmission of mitochondrial DNA disease. This technique transfers the nuclear DNA from an affected embryo into a donor egg with healthy mitochondria, resulting in children harboring DNA from three individuals. While most babies showed no health issues, some exhibited minor complications or low levels of mutant DNA. The findings, published in The New England Journal of Medicine, mark a clinical milestone and offer hope for families at risk of mitochondrial disorders.