Scientists and religious groups have clashed over proposals for three-parent IVF, which are being debated in Westminster later today.
"If we're going to allow parents to chose what sort of genes their children have, that's a massive Rubicon and that's such a big Rubicon that in every other country this is not legal."
"This research is about providing women who carry a specific sort of genetic disease reproductive choice. We already have ability for some genetic diseases to select on specific embryos."
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