"It was pretty soon after James was born that I knew something wasn't right," says Laura. She and her partner, Beth, have two children - James, and their eldest Kate - both conceived through IVF treatment at a clinic in Northern Cyprus. The two women used their own eggs and carefully chose one anonymous, healthy sperm donor. They told the clinic which ordered the sperm for them that it was important the same donor was used for both babies - so their children would be biologically related. But