Reproductive health (RH) has historically received low priority in the hierarchy of humanitarian response. Awareness of RH needs in emergencies began in the mid-1990s and led to the formation of the Inter-Agency Working Group (IAWG) for RH. Subsequently, the Minimum Initial Service Package (MISP), a set of guidelines for RH service delivery in crisis settings, was created. The objectives of the MISP are to facilitate the coordination of RH services, prevent and manage the consequences of sexual violence, reduce HIV transmission, minimize maternal and neonatal morbidity and mortality, and plan for comprehensive RH services in the post-crisis phase. Available documentation on MISP implementation is minimal, and reveals mixed success. Challenges include low MISP awareness, inadequate RH training among humanitarian actors, logistical difficulties and poor coordination. Continued emphasis on advocacy and capacity building, a stronger focus on logistics and coordination and a greater commitment to monitoring and evaluation are essential for improving the MISP's effectiveness in the field.