The Center for Bioethics at the University of Pennsylvania is the internationally recognized leader in bioethical education and research. Its interdisciplinary faculty is drawn from the fields of medicine, law, nursing, education, philosophy, psychology, and religious studies. The Penn Center's leading fellows have combined their expertise with other contributors to create this work, a guide to both traditional and cutting-edge bioethical issues. It navigates uncharted ethical terrains, covering the challenging controversies generated by new technologies, theories, and medical advances. This volume represents the Penn Center's distinct, pioneering approach to bioethics, one that emphasizes empirical treatment of bioethical issues, and the integration of bioethical scholarship with practical application. It is a work that is designed to help readers get answers to the bioethical issues of the day.