Genetic research has discovered some 15,000 diseases that travel through generations. Since 1989, it's been possible to screen embryos for 350 of these hereditary conditions, but the process takes almost a year and is very expensive. Now, British scientists are claiming a breakthrough, new testing that can detect almost all genetic diseases in just a few weeks. The new process, called "karyomapping," has been developed at London's Bridge Centre, a fertility clinic. The Director is Professor Alan Handyside.