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The fertility regulator's public consultation also showed "general support" for the idea as the benefits outweighed the risks.
A final decision on whether to press ahead rests with ministers.
If the techniques were approved it could help a handful of families each year. Around one in 6,500 children develop serious "mitochondrial disorders" which are debilitating and fatal.
Research suggests that using mitochondria from a donor egg can prevent the diseases.
However, it would result in babies having DNA from two parents and a tiny amount from a third donor.
Concerns have been raised both about the safety and the ethics of creating such babies.
The results of a public consultation at the end of 2012 showed there was support for the idea.
Prof Neva Haites, who was on the expert panel supervising the consultation, said: "Broadly speaking the public was in favour of these novel techniques being translated into treatments.
"They felt that any ethical concerns were...