Great progress has been made in genetics in recent years, with significant consequences for the field of reproductive genetics. The ability to identify genetic defects before implantation, to diagnose fetal abnormalities and to introduce screening programmes means that genetic testing now has a major role in preventive medicine. The 57th RCOG Study Group brought together a range of experts to examine the many clinical, ethical and societal issues around reproductive genetics. This book presents the findings of the Study Group, covering a range of disorders, advances in treatments and techniques, as well as the importance of educating the public and the potential ethical dilemmas that may arise as a result of new scientific findings and new methodologies.