The study examined public health policies and healthcare delivery implementation with a focus on Mortality and Maternal health care delivery in selected teaching hospitals in south-south, Nigeria. Despite the existence of numerous maternal and child health policies and reforms Nigeria consistently high infant and maternal mortality rates served as the impetus for the study. The study used a mixed methods approach that combined key informant interviews with survey research. Structured questionnaires were used to gather data from 291 administrators and healthcare professionals in a subset of teaching hospitals and senior hospital officials were interviewed in-depth. The quantitative data was analyzed using descriptive statistics and multiple linear regression analysis and the qualitative data were analyzed using content analysis. The significance level for the regression analysis was set at five percent (p 0. 05). The results of the regression analysis showed that the implementation of public health policies had a significant impact on Mortality outcomes (β = 0. 287 t = 4. 556 p = 0. 000) suggested that better infant survival is a result of well-executed health policies. Maternal and Health care service delivery were also strongly and significantly impacted by healthcare delivery practices (β = 0. 421 t = 5. 847 p = 0. 000) indicated that providing high-quality services is essential to enhancing maternal and child health. Furthermore, maternal and Health care service delivery were significantly impacted by health system capacity (β = 0. 198 t = 3. 414 p = 0. 001) underscoring the significance of sufficient staffing infrastructure and institutional preparedness. The robustness of the results was confirmed by the model which explained roughly 67. 4 percent of the variation in maternal and Health care service delivery (R² = 0. 674). The study comes to the conclusion that lowering Mortality and improving maternal and Health care service delivery in teaching hospitals in South-South Nigeria require improved institutional capacity strengthened healthcare delivery methods and effective public health policy implementation. To achieve long-lasting improvements in maternal and Health care service delivery it suggests more robust policy monitoring mechanisms more funding for maternal and child health programs ongoing capacity building for healthcare professionals and better health system infrastructure.