|A stem cell technique that uses DNA from three people could prevent a variety of hereditary diseases, researchers believe.
The technique screens embryos for incurable genetic diseases. If an abnormality is found, the defective DNA is replaced with that of another woman.
Earlier this year, scientists at Newcastle University created the first IVF embryo using the DNA of one man and two women.
They say it could prevent diseases like diabetes, muscular dystrophy, epilepsy, blindness and heart problems.
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