Lane argues that Charles Peirce’s philosophy can contribute to contemporary debates about the metaphysical and moral status of prenatal humans. Some participants in those debates view an early embryo as numerically identical to, and as having the same moral status as, the adult to which it gives rise; bioethicists in this camp tend to maintain that our metaphysical and moral judgments about prenatal humans are capable of objective truth. Others argue from the continuity of prenatal development to the view that metaphysical judgments about when beings like us begin to exist and moral judgments about when beings like us attain moral status cannot be objective. Lane argues that Peirce provides the resources for developing alternative positions. Those resources are Peirce’s synechism, according to which continuity is of central importance in philosophy, his scholastic realism, according to which there are real kinds, his basic realism, according to which there is a world that is the way it is apart from how anyone represents it to be, and his pragmatic clarifications of the concepts of reality and truth.