The UK isn't the first country to create babies using MDT. In 2016, a US doctor announced the world's first MDT birth. This technique is being used to prevent harmful mutations in mitochondrial DNA. The vast majority of our DNA resides in the nucleus but there's a tiny bit that resides in somewhere else - called mitochondria.
The pioneering IVF procedure known as mitochondrial donation therapy (MDT) could prevent children from being born with devastating mitochondrial diseases. Madeleine Finlay speaks to Prof Darren Griffin, an expert in genetic diseases and reproduction, about how MDT works, the ethical considerations attached, and what techniques like it could mean for the future of reproduction. Help support our independent journalism at
theguardian.com/sciencepod