Decision whether to allow the creation of babies from three people - mum, dad and a second, donor, woman. is on

Prof Doug Turnbull said developing the technique had been a "massive team effort"On Tuesday, MPs will decide whether to allow the creation of babies from three people - mum, dad and a second, donor, woman.

It could prevent deadly mitochondrial disease, but has provoked a fierce ethical debate.

DNA for mitochondria - tiny compartments within cells which unlock the energy from food - is passed from mothers to children, so a donor woman's mitochondria might stop the disease.
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