Eight healthy babies have been born in the UK using a groundbreaking technique involving DNA from three people. This method, approved by a 2016 UK law, helps mothers avoid passing on devastating mitochondrial diseases to their children. The technique involves transferring the mother's genetic material into a donor egg with healthy mitochondria. While one baby showed slightly higher than expected levels of abnormal mitochondria, it's not considered disease-causing. Experts hail this as a scientific triumph, offering hope to families affected by these rare diseases, though ethical concerns and regulatory hurdles remain in other countries, including the US.

Prepared by Olivia Bennett and reviewed by editorial team.