This document discusses ethical issues relating to human genetic testing. It is intended primarily for health professionals and researchers who are involved in the testing process or who refer people for testing. It will also assist others to understand the ethical and practical issues associated with genetic testing and, because a wide audience is expected to read the document, some introductory material on genetic testing has been included as background to the ethical issues. It deals principally with operational issues related to current practice, such as obtaining consent, counselling, privacy and confidentiality. In general, it does not attempt to discuss broader moral and philosophical issues, although these are recognised as being important. Criteria for developing or prioritising genetic tests, or laboratory standards for delivering tests of high quality, are not addressed.