The baby girl, born on Jan 5 in Kiev, is thought to be the world's second "modern three-parent baby" - another child was created using a slightly different method in Mexico last year to avoid it inheriting a serious hereditary disease called Leigh Syndrome.
The couple had been unable to conceive with conventional IVF due to "embryo arrest" - when fertilised eggs stop growing after generating only a few cells, said Nadiya Clinic director Valery Zukin.
By placing a pronucleus from the mother – which contains her chromosomal DNA plus that of the father – into the egg of a donor, the team may have found a way to get around whatever was causing the early arrest, New Scientist said.
“It’s good news the child seems healthy, and that the procedure in this case seems safe, at least until birth,” Bert Smeets, a fertility expert at Maastricht University in the Netherlands, told the New Scientist.
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