Laura Grabel is Fisk Professor of Natural Sciences and professor of biology at Wesleyan University. She has worked with embryonic stem cells for more than twenty years, and her current projects include identifying signals that promote the differentiation of embryonic stem cells and examining conditions that support successful transplantation of these cells in mouse models of human disease. She is an advocate for stem cell research and collaborates with Lori Gruen on topics in biological ethics.

Peter Singer is currently the Ira W. DeCamp Professor of Bioethics at Princeton University and Laureate Professor in the Centre for Applied Ethics and Public Policy at the University of Melbourne. He has taught at the University of Oxford, New York University, La Trobe University, and Monash University. His books include Animal Liberation, Practical Ethics, The Reproduction Revolution, Rethinking Life and Death, and, most recently, The Way We Eat.

1. Introduction: Laura Grabel and Lori Gruen.

2. The Ambiguity of the Embryo: Ethical Inconsistency in the Human Embryonic Stem Cell Debate: Katrien Devolder and John Harri.

3. Killing Embryos for Stem Cell Research: Jeff McMahan.

4. The Moral-Principle Objection to Human Embryonic Stem Cell Research: Don Marquis.

5. How is the Ethics of Stem Cell Research Different from the Ethics of Abortion?: Elizabeth Harman.

6. Respecting Human Embryos within Stem Cell Research: Seeking Harmony: Bertha Alvarez Manninen.

7. Rescuing Human Embryonic Stem Cell Research: The Possibility of Embryo Reconstitution after Stem Cell Derivation: Katrien Devolder and Christopher M. Ward.

8. The Moral Status of Stem Cells: Agata Sagan and Peter Singer.

9. Oocytes for Sale?: Lori Gruen.

10. Human-Animal Chimeras: Human Dignity, Moral Status, and Species Prejudice: David Degrazia.

11. Why No Compromise is Possible: Torbjörn Tännsjö.

Index