Newcastle University scientists successfully created an embryo with 3 parents. They are hopeful that this method could one day help treat mitochondrial diseases:
The Newcastle team have effectively given the embryos a mitochondria transplant. They experimented on 10 severely abnormal embryos left over from traditional fertility treatment.
Within hours of their creation, the nucleus, containing DNA from the mother and father, was removed from the embryo, and implanted into a donor egg whose DNA had been largely removed.
The only genetic information remaining from the donor egg was the tiny bit that controls production of mitochondria - around 16,000 of the 3billion component parts that make up the human genome.
The embryos then began to develop normally, but were destroyed within six days.