APA
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Rajasingham, M., Premranjith, P., Brown, H. K., Atkinson, D. J., D’Souza, R., Frey, B. N., … Muraca, G. M. (2026). Severe maternal morbidity from conception to six weeks postpartum: a population-based longitudinal cohort study. . CMAJ, 198(10), E344–E357. https://doi.org/10.1503/cmaj.251425
Chicago/Turabian
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Rajasingham, M., P. Premranjith, H.K. Brown, D.J. Atkinson, R. D’Souza, B.N. Frey, S. Green, S.M. Jack, and G.M. Muraca. “Severe Maternal Morbidity from Conception to Six Weeks Postpartum: a Population-Based Longitudinal Cohort Study. .” CMAJ 198, no. 10 (2026): E344–E357.
MLA
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Rajasingham, M., et al. “Severe Maternal Morbidity from Conception to Six Weeks Postpartum: a Population-Based Longitudinal Cohort Study. .” CMAJ, vol. 198, no. 10, 2026, pp. E344–E357, doi:10.1503/cmaj.251425.
BibTeX Click to copy
@article{rajasingham2026a,
title = {Severe maternal morbidity from conception to six weeks postpartum: a population-based longitudinal cohort study. },
year = {2026},
issue = {10},
journal = {CMAJ},
pages = {E344-E357},
volume = {198},
doi = {10.1503/cmaj.251425},
author = {Rajasingham, M. and Premranjith, P. and Brown, H.K. and Atkinson, D.J. and D’Souza, R. and Frey, B.N. and Green, S. and Jack, S.M. and Muraca, G.M.}
}
Article summary
This Ontario population-based study (2012–2021) of over 1 million births found that severe maternal morbidity (SMM) occurred in about 27 per 1,000 births (nearly 3%). While most cases happened during labor (55%), a substantial portion occurred before (16%) and after delivery (29%). Severe hemorrhage was the most common complication overall, with sepsis prominent postpartum. Risk factors differed by timing—for example, younger mothers (15–19) had higher antepartum risk, while intrapartum and postpartum risks followed a U-shaped pattern by age. Overall, about 40% of SMM cases occurred outside the delivery period, highlighting the importance of monitoring across the full pregnancy and postpartum timeline.