The first three-parent babies could be born by 2015 after the government set out new draft regulations which will allow donor DNA from a second mother to be implanted into a defective egg.
A debate is being held in Westminster about the UK becoming the first country in the world to legalise babies with three biological parents. The controversial IVF technique has never been tried before.
Scientists in Newcastle are pushing for the technique to made legal. But critics say it's completely unethical and would be a step too far for the human race.
Helen Ford reports on one woman who lost seven children to genetic illness, and is in favour of the change:
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