Stunting remains a priority challenge in Indonesia's health development due to its long-term impact on physical growth, cognitive development, and human resource quality. Accelerating stunting reduction requires a contextual, culturally based approach to improve the acceptance and sustainability of interventions. This study aims to explore the transformation of the Petompo'a tradition a seven-month ceremony for pregnant women in North Buton Regency as a medium for nutrition and health education in preventing stunting from the pregnancy period. The study used a qualitative approach with a phenomenological design, involving pregnant women, traditional leaders, and health workers selected purposively. Data were collected through in-depth interviews, participatory observation, and Focus Group Discussions, then analyzed using thematic analysis. The results show that Petompo'a holds great potential as a culturally based educational medium because it is widely accepted, carries legitimacy through traditional leaders, and is rich in symbolism supporting health values. Integrating nutrition and health messages increased pregnant women's awareness of nutritional intake, antenatal care visits, and the prevention of anemia and stunting. Positive behavioral changes were also found, such as improved dietary patterns, adherence to health advice, and stronger social support. The transformation of Petompo'a proves that a culturally based approach can serve as an effective entry point while strengthening intervention sustainability. The study recommends integrating this tradition into maternal and child health policies through collaboration among traditional leaders, health workers, and local government.
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