Britain's fertility regulator on Wednesday confirmed the births of the U.K.'s first babies created using an experimental technique combining DNA from three people, an effort to prevent the children from inheriting rare genetic diseases.
Britain's Human Fertilization and Embryology Authority said fewer than five babies have been born this way in the U.K. but did not provide further details to protect the families' identities. The news was first reported by the Guardian newspaper.
For a woman with faulty mitochondria, scientists take genetic material from her egg or embryo, which is then transferred into a donor egg or embryo that still has healthy mitochondria but had the rest of its key DNA removed. Britain requires every woman undergoing the treatment to receive approval from the Human Fertilization and Embryology Authority. The regulator says that to be eligible, families must have no other available options for avoiding passing on genetic disease.
Robin Lovell-Badge, a stem cell expert at the Francis Crick Institute, a biomedical research center in London, said it would be critical to monitor the babies' future development.
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