LONDON — Britain may allow a controversial technique to create babies using DNA from three people, a move that would help couples avoid passing on rare genetic diseases, the country’s top medical officer says.
The new techniques help prevent women with faulty mitochondria — the energy source in a cell — from passing on to their babies defects that can result in such diseases as muscular dystrophy, epilepsy, heart problems, and mental retardation. About 1 in 200 children is born every year in Britain with a mitochondrial disorder.
For a woman with faulty mitochondria, scientists take only the healthy genetic material from her egg or embryo. They then transfer that into a donor egg or embryo that still has its healthy mitochondria but has had the rest of its key DNA removed. The fertilized embryo is then transferred into the womb of the mother.
Some groups oppose artificial reproduction techniques and believe the destruction of eggs or embryos to be immoral.
If lawmakers agree, the United Kingdom would become the first country in the world where the technique could be used to create babies.