Speaking after MPs voted overwhelmingly in favour of allowing a "three-person" IVF technique, Dr Jeremy Farrar, director of the Wellcome Trust, said:
This is a vote of confidence in the patients, scientists, doctors and ethicists who have worked hard for a decade to explain this complex research to politicians, the public and the media, and in the exemplary process for reviewing scientific, ethical and public opinion led by the Human Fertilisation and Embryology Authority.
MPs have voted in favour of a ground-breaking but controversial technique that could see IVF babies conceived with DNA from three people.
A vote on three-parent babies, taking place today, could determine paediatric nurse Rachel Steel's chances of having her own healthy kids.
The parents of a baby with a life-limiting disorder say their future happiness will be decided by today's three-parent family vote.