[Intentional search and reclassification of maternal deaths: quality information and its analysis to reduce maternal mortalityBusca intencional e reclassificação de mortes maternas: informação de qualidade e sua análise para reduzir a mortalidade materna].

Objective: To describe the methodology of the intentional search and reclassification of maternal deaths (BIRMM, acronym in Spanish), which allows the identification and correction of misclassification and underreporting of maternal deaths. Methods: The BIRMM methodology, initially developed in Mexico in 2003 and disseminated in other Latin American countries since 2012, was used. BIRMM consists of four key components: i) reclassification of confirmed maternal deaths; ii) identification and investigation of suspected cases of maternal death; iii) cross-referencing with other information sources; and iv) publication of results and statistical analysis. Results: The application of BIRMM makes it possible to identify and analyze maternal deaths in maternal mortality committees, which has facilitated the implementation of effective response plans, contributing to a sustained reduction in maternal mortality in the countries. Conclusions: The BIRMM methodology is an effective tool for correcting underreporting and misclassification of maternal deaths, allowing better surveillance and response to this problem. Its adoption and routine implementation are essential to improve the quality of maternal mortality information and reduce maternal deaths in the Region of the Americas. The sustainability of this methodology depends on institutional commitment and political will in the countries.