Next week Insight considers what might happen when the lottery of life is no longer random. It asks whether humans should embrace the new genetic technologies to 'breed out' disease and illness, whether it is wrong to play god and interfere with nature, and where to draw the line.

Every day, mothers are being screened to see if their future children could be at risk of diseases including Down syndrome, cystic fibrosis, muscular dystrophy and spina bifida.