Fertility doctors using a brand new technique to eliminate inherited disease have helped a woman deliver a baby with three genetic parents.
The child who is now five months old, has the usual DNA from his mum and dad, plus genetic code from a female donor. The method was carried out in Mexico by US Dr John Zhang and his team as the procedure is illegal in America.
It means the child is now free of a fatal disorder known as Leigh Syndrome which carried in his mother’s genes lead to the deaths of two previous children.
Experts say the move heralds a new era in medicine and could help other families with rare genetic conditions however critics say its playing god and insist such controversial techniques have rigorous checks .