Mitochondrial replacement therapy is an in vitro fertilization technique that involves the DNA of three people. Knowing how well the procedures worked and whether the babies are free of mitochondrial disease is crucial, according to Robin Lovell-Badge, a developmental biologist at the Francis Crick Institute in London, who gave a statement to the UK Science Media Centre. 60323, Westend-Süd (DE)Global Talent Search - Shenzhen Institute of Advanced Technologies, Chinese Academy of SciencesShenzhen, Guangdong, China