De Silva DA, et al. - In this investigation, researchers explored the link between interpregnancy interval (IPI) and severe maternal morbidity using near-national birth certificate data and account for known under-reporting using probabilistic bias analysis. For this analysis, they employed revised 2014-2017 birth certificate data, restricting to resident women with a non-first-born singleton birth. Among IPI <6 months, the uterine rupture risk was highest. Even after adjusting for misclassification of SMM, connections between IPI and maternal morbidity differed by the result. Differences over maternal health outcomes should be considered when advising and making suggestions regarding optimal birth spacing.