Mathematica will develop an evidence-based mathematical model to calculate the societal costs of maternal morbidity, which will account for medical treatment costs and costs due to longer-term consequences on maternal and child health. They will use the model to develop national costs, as well as costs borne by subgroups across race and income. To accomplish this goal they will: 1) conduct a literature review to synthesize the evidence base on maternal morbidity; 2) develop a conceptual framework that will form the foundation of the quantitative model -- the framework will be informed by the literature review, but they expect it to include costs due to adverse impacts on mothers, costs due to adverse impacts on children, costs borne by public sector; and 3) develop the adaptive quantitative model.