Scientists have announced the birth of the first baby using a controversial new three-parent technique. The boy, whose parents are Jordanian, has two biological mums and one biological dad.
The technique was used so that the mother could have a child with her DNA without passing on a genetic disease.
The 36-year-old woman is a carrier for a fatal nervous system disorder called Leigh syndrome. Tragically, she’s already had two children die from the disease, one at the age of eight months and the other at the age of six. She’s also had four miscarriages.
The boy born using this technique is now five months old and doing well.
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How did they do it?
A team, led by New York’s Dr John Zhang, took the nucleus from one of the mother’s eggs and implanted it into a donor egg, which had had its nucleus removed. That means, the egg got the nuclear DNA from the mum, which wasn’t carrying the genes for the disorder, but not the mitochondrial DNA, which was.
The egg was fertilised with the father’s sperm. It was implanted into the mother, and she had an “uneventful” pregnancy.