Obstetric hemorrhage and severe high blood pressure during pregnancy are leading known causes of preventable maternal harms in the United States. The AHRQ Safety Program for Perinatal Care, Phase 2 developed toolkits consisting of case scenarios, slides, and facilitators guides to work in tandem to address these threats to maternal safety. The materials inform training opportunities to improve the safety culture of labor and delivery units and decrease maternal and neonatal adverse events that result from poor communication and system failures.

Maternal safety is threatened by systemic biases, care complexities, and diagnostic issues. This issue brief explores the role of diagnostic error in maternal morbidity and mortality, the preventability of common problems such as maternal hemorrhage, and the importance of multidisciplinary efforts to realize improvement. The brief focuses on events occurring during childbirth and up to a week postpartum. This issue brief is part of a series on diagnostic safety.