This Essay provides relatively novel answers to two related questions: First, are there moral reasons to limit the sorts of existences it is permissible to bring people into, such that one would be morally prohibited from procreating in certain circumstances? Second, can the state justify a legal prohibition on procreation in those circumstances using that moral reasoning, so that the law would likely be constitutional? These questions are not new, but my answers to them are and add to the existing literature in several ways. First, I offer a possible resolution to a recent debate among legal scholars regarding what has been called the nonidentity problem and its relation to the right to procreate. Second, using that resolution, I provide a novel constitutional argument that at least begins to justify limiting the right to procreate.