A method of cellular surgery called spindle transfer may be the future key to helping mothers avoid passing on a variety of inherited diseases. The method developed at Oregon Health & Science University brings a third genetic parent into the reproductive process by introducing mutation-free mitochondria from a donor egg. Bioethicists are beginning to raise questions, however, but lead scientist Shoukhrat Mitalipov says "we believe a public discussion is a healthy part of this process."

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