Three-person embryos may fail to vanquish mutant mitochondria : Nature News & Comment
Once again, I ask - why do this at all? It's a bit sad that it's not safe for every mother to be able to have their own genes in their children, but with the ability to carry an embryo (via egg donation) with at least their partner's genetic heritage, they can still have the experience of carrying a child.
It's pretty much like the ultimate "First World problem", and I don't understand why medical science is so interested in fiddling with genetic material to solve it.
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