Abstract

Human embryos produced in labs since the 1970s have generated layers of uncertainty for law and policy: ontological, moral, and administrative. Ontologically, these lab-made entities fall into a gray zone between life and not-yet-life. Should in vitro embryos be treated as inanimate matter, like abandoned postsurgical tissue, or as private property? Morally, should they exist largely outside of state control in the zone of free reproductive choice or should they be regarded as autonomous human lives and thus entitled to constitutional protection like full-fledged citizens? Administratively, if they deserve protection, what institutional and policy mechanisms are best suited to carrying out the necessary oversight? Using a method termed comparative problematization, this article traces divergent answers to these questions produced in three countries—the United States, United Kingdom, and Germany—across the last twenty-five years. Comparison reveals distinct bioconstitutional foundations that give rise to systematically different understandings of each state’s responsibilities toward human life and hence its particular treatment of claims on behalf of embryonic lives.