Failure to access reproductive health care is a threat to the security of women around the world. This article offers three propositions to recognize reproductive health as a matter of international peace and security. The first is to recognize current processes of advancement and backlash politics as a silent security dilemma that undermines rights, justice, and public health based approaches to reproductive health. The second is to draw on the human security origins of global health security to reorient the concept away from protecting states to protecting individuals. Finally, a feminist approach to security is incomplete without recognising reproductive health as a threat to women's security and as a barrier to their participation in international peace and security processes. Reproductive health is central to effective peacebuilding yet remains curiously absent from the international peace and security discourse. We discuss how and why reproductive security should become integrated within the Women, Peace, and Security (WPS) agenda in order to hold states to account for reproductive health access. Reproductive security defines the urgency and threat of restricted reproductive health care to the lives of women, health-care providers, and sustained international peace and security.