The rapid advances in genetic testing are having a profound impact on millions of people around the world. Hardly a week goes by without news reports about the discovery of a new gene, usually linked to a chronic and often deadly disease. Is the information good or bad news, useful or irrelevant? What is the meaning of this new-found knowledge for people and their families? And, most important, how can we use this information to improve our lives and those of our children? Many families wanting to avail themselves of the latest genetic discoveries have, until now, been unable to fully understand their options. 'Double-Edged Sword', presents the practical applications of the genetic revolution - what the latest findings mean for families who suffer from genetic diseases as well as for the myriad people who want to use genetic screening to improve their lives. 'Double-Edged Sword' also explores the many negative issues that have arisen with the proliferation of genetic testing. The identification of a gene for a devastating disease does not necessarily mean that a cure is imminent. Under these circumstances is a person better or worse off with the knowledge of his or her genetic makeup? And what about expectant parents who, learning the genetic makeup of their fetus, face the wrenching decision of whether or not to abort? What will prevent employers and insurance companies from using genetic test results to discriminate between the 'healthy' and 'sick'? 'Double-Edged Sword', elucidates, through case histories, fascinating stories, and the latest research, the key issues that surround the social, medical, and ethical implications of the genetic revolution. Although this genetic revolution will dramatically change the way we live our lives in the near future, the danger of abuse is great and growing, and our society must be prepared to confront these astounding new capabilities.