In Brazil, the only information system that provides data on maternal morbidity is the Hospital Information System (SIH), but there are difficulties in implementing the criteria recommended by WHO and doubts about the quality of information. The project will validate the SIH against the Maternal Near Miss criteria and will build and validate an algorithm to identify severe maternal morbidity. As a product, it will develop an online indicator panel for the surveillance of maternal health to be used by SUS managers.