their mother and father but would take their
mitochondrial DNA from the donor
Researchers have secured £6m in funding to develop the groundbreaking treatment which could prevent genetic conditions affecting the heart, muscle or brain being passed on to children and future generations.
But the method is controversial because it involves transferring the parents' DNA into a donor egg, meaning the resulting child would inherit a tiny fraction of their genetic coding from a third party.
Regulations currently forbid scientists from implanting such eggs into patients.