From embryo selection to abortion, fertility treatment to stem cell research, medical advances have created a furious ethical debate. Now MPs must decide how far science should be allowed to go.

Like any other three-year-old child, Molly has brought joy to her parents. Bright-eyed and cheerful, Molly is also deaf - and that is an issue which vexes her parents, though not for the obvious reasons. Paula Garfield, a theatre director, and her partner, Tomato Lichy, an artist and designer, are also deaf and had hoped to have a child who could not hear. (Guardian)