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Britain to allow mitochondrial donation during in vitro fertilisation.
The UK will be the first country in the world to allow IVF using nuclear DNA from both parents and mitochondrial DNA from a donor egg. The aim is to avoid mitochondrial diseases such as some muscular dystrophy types, Leber hereditary optic neuropathy and Leigh syndrome. About 150 women would be eligible in the UK each year. The first procedure is likely towards the end of 2015.