Babies made using three people's DNA are born free of hereditary diseaseWatch the moment DNA from a mum and dad is injected into the fertilised egg of another woman - the critical step in the creation of a baby made from three peopleEight babies have been born in the UK using genetic material from three people to prevent devastating and often fatal conditions, doctors say.The method, pioneered by UK scientists, combines the egg and sperm from a mum and dad with a second egg from a donor woman.Th...