In this timely collection, some of the world's leading ethicists grapple with the variety of issues posed by human embryonic stem cell research. Investigates the moral status of the embryo including the creation of chimeras and paying for gametes (eggs and sperm) and embryos for research purposes Provides a thorough evaluation of the ethics and politics of regulating hESC research, and the privacy, confidentiality, and informed consent in the conduct of research and clinical investigations Essential reading for scientists, philosophers, policy makers, and all who are interested in the ethical conduct of science Contributors include David DeGrazia, Lori Gruen, Elizabeth Harman, John Harris, Jeff McMahan, Don Marquis and Peter Singer