Objective: To describe the development of Project Passport, a perinatal intervention designed to reduce negative outcomes among pregnant teens. Methods: A logic model guided the planning, development and evaluation plan for the intervention. It included the selection of health goals, behaviors to be targeted, determinants of the selected behaviors, and activities to impact each selected determinant. Results: The process resulted in the formulation of an intervention that incorporates CenteringPregnancy, a group model of prenatal care, Positive Youth Development components, and male involvement. The evaluation examines the effectiveness of the intervention in enhancing health, educational and psychosocial outcomes among pregnant adolescents. Conclusions: The present program was designed to address an important gap in evidence-based interventions targeting pregnant adolescents and their partners. [This project was funded by the Department of Health and Human Services, Office of Adolescent Pregnancy Programs (OAPP).]