In Britain, several children were born with DNA from three parents.

This helps protect against hereditary genetic diseases. Reproductologists removed the nucleus from the mother's fertilized egg and transplanted it into a fertilized donor cell with healthy mitochondria, from which its nucleus had previously been removed. For the first time, children from "three parents" were born in Mexico in 2016. With the help of American specialists, the woman was able to have a baby after two unsuccessful attempts - she was a carrier of Leigh's syndrome, although she herself did not suffer from the disease.