"The scientists will transfer the pro-nuclei - the components of a human embryo nucleus - made by one man and woman into an unfertilised egg from another woman."
You know, these scientists sure can take all the fun out of your run-of-the-mill threesome! ;)
I read the article a couple of times and maybe I'm just dull today, but it isn't clear at least to me whether this process involves the destruction of a fertilized egg/IOW embryo. Do you get it?