Why are so many British women travelling abroad for fertility treatment? With claims of better success rates, pioneering treatments and cheaper IVF, foreign fertility clinics are cleaning up. So are 'fertility tourists' really getting a better deal? Anna Magee investigates; With claims of better success rates, pioneering treatments and cheaper IVF, foreign fertility clinics are cleaning up. So are 'fertility tourists' really getting a better deal? Anna Magee investigates