February 4, 2015 | David

Science can pose ethical questions I struggle with. Fortunately, I don't have to cast decisive votes on important science policies. UK MPs have just voted to approve a controversial fertility treatment - an idea supported by many prestigious scientists and advisers.

The treatment replaces a small amount of harmful DNA in an embryo with healthy DNA from a third 'parent'. I'm undecided. The technique could change the lives of some prospective families. But it's manipulating human life at its earliest stage, which makes me uneasy. I hope the scientists get it right.

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The technique corrects mitochondrial disease, a debilitating condition that a baby can inherit from its mother.

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Image: Flickr/Scott Maxworthy

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