This third edition has been updated to incorporate the statements issued since the preparation of the second edition. The authors have revised the introductory chapters to include ideas from the papal encyclical Splendor Veritatis and "Instruction of the Ecclesial Vocation of the Theologian," published by the Vatican Congregation for the Doctrine of the Faith, concerning the various levels of the teachings of the Church. Other new statements included in this edition are relevant topics from the papal encyclical Evangelium Vitae (abortion, euthanasia, amniocentesis, suicide and withdrawing life support); the Vatican Congregation of Doctrine and Faith on uterine isolation; the U.S. bishops on the care of anencephalic infants, genetic testing, and cloning; and the Pennsylvania Catholic Conference on the treatment for rape in Catholic hospitals.

Kevin D. O’Rourke, O.P., is the former director of the Center for Health Care Ethics and Professor of Clinical Ethics, Department of Internal Medicine, Saint Louis University. Philip Boyle is senior vice president and editor-in-chief of the Park Ridge Center, Chicago, Illinois.