First babies born from experimental DNA technique combining from three people

The U.K. fertility regulator confirms births of the first babies created using an experimental technique combining DNA from three people to prevent rare genetic diseases passed from mothers to children.
The technique aims to prevent children from inheriting rare genetic diseases caused by faulty mitochondria that can result in diseases such as muscular dystrophy, epilepsy, heart problems and intellectual disabilities.
Scientists take genetic material from the mother's egg or embryo and transfer it into a donor egg or embryo with healthy mitochondria.
The U.K. became the world's first country to adopt legislation regulating methods to help prevent women with faulty mitochondria from passing defects onto their babies in 2015.
Critics argue there are other ways to avoid passing diseases onto children and that the experimental methods have not yet been proven completely safe.