A bold step for science?

 "..The technique itself will result in babies with DNA from three people - two women and a man - and this genetic alteration will be passed down the generations.

Once babies have been born using this technique, there will be no going back. A permanent and novel genetic change to members of the human race will have been made.

That might sound pretty worrying, and talk of three people's DNA mixed together seems a bit ghoulish at first glance. So is this science overstepping the mark?

There will be some who find this disturbing - tampering with nature. But for the families affected by mitochondrial disease it is a chance to have a healthy child, and to ensure that future generations are healthy too.."

First the test tube baby. Now a risky approach to creating designer babies in a bid to maintain "healthy" generations. 

Crazy.