Reproductive BioMedicine Online, Duck End Farm, Dry Drayton, Cambridge BB3 8DB, UK.
New ethical issues emerge from the rapid expansion in knowledge of preimplantation genetics. These were summarized and debated recently during the final session at the Fourth International Symposium on Preimplantation Genetics, held in Cyprus, 10-13 April 2002. Divergent views were expressed on various topics including unique issues in preimplantation genetic diagnosis, the sexing of embryos, cloning and other matters. Differing ethical viewpoints emerged, and alternative ways of coping with certain issues were described. This complex area of ethical and social issues will demand detailed counselling of patients, ongoing debate among professionals, and perhaps legislation or central regulatory authorities to decide on the detailed application of its new technologies.