UK considers passing law to allow babies to be made from three sets of DNA

Britian is on the path to becoming the first country to allow a technique to create babies using DNA from three people in a bid to help prevent couples passing on rare genetic diseases.
The technique, which scientists say would not creat a 'three parent child', helps 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.
The debate is causing controversy as Parliament gears up to making a decision on whether the technique should be made legal.
Al Jazeera's Simon McGregor-Wood reports from London.