The UK not only developed the science of three-person babies, but it also became the first country in the world to introduce laws to allow their creation after a vote in Parliament in 2015.
There was controversy as mitochondria have DNA of their own, which controls how they function.
It means the children have inherited DNA from their parents and around 0.1% from the donor woman.
Any girls born through this technique would pass this onto their own children, so it is a permanent alteration of human genetic inheritance.
This was a step too far for some when the technology was debated, raising fears it would open the doors to genetically-modified “designer” babies.
Prof Sir Doug Turnball, from Newcastle University, told me: “I think this is the only place in the world this could have happened, there’s been first class science to get us to where we are, there been legislation to allow it to move into clinical treatment, the NHS to help support it and now we’ve got eight children that seem to free of mitochondrial disease, what a wonderful result.”