Core strategies, social processes, and contextual influences of early phases of implementation and statewide scale-up of group prenatal care in South Carolina.

This mixed-methods process evaluation examined a state-wide, interagency collaborative in South Carolina that expanded CenteringPregnancy group prenatal care from two to five additional healthcare practices from 2012 to 2015. The evaluation focused on delineating core processes, strategies, and external contextual elements of group prenatal care implementation and scale-up. Success of this scale-up was enhanced by the effective use and creation of windows of opportunity, which allowed stakeholders to pursue actions consistent with their own values, at both state and organizational levels. Most importantly, strong political advocacy and state-level financial commitment for group prenatal care made it possible for clinics throughout South Carolina to begin providing CenteringPregnancy to their patients. Improved understanding of the processes involved in scaling-up pilot interventions may enhance the effectiveness and efficiency of future expansion efforts.