Great Britain has voted to allow the world’s first “three-parent” in vitro fertilization. The new technique uses the DNA of three people to prevent mothers from passing mitochondrial diseases on to their baby. The new treatment that was allowed by the British Parliament on Tuesday is known as “three-parent” in vitro fertilization (IVF) because the babies, born from genetically modified embryos, would have DNA from a mother, a father and from a female donor. In Britain’s House of Commons on Tuesday, health minister Jane Ellison started the debate on mitochondrial donation by urging support for this change. “This is a...