1. CDC (2018). Pregnancy mortality surveillance system
2. Creanga, A., Berg, C., Syverson, C., Seed, K., Bruce, C., & Callaghan, W. (2015). Pregnancy-related mortality in the United States, 2006–2010. Obstetrics Gynecology, 125, 5–12.
3. Dol, J., Hughes, B., Bonet, M., Dorey, R., Dorling, J., Grant, A., Langlois, E. V., Monaghan, J., Ollivier, R., Parker, R., Roos, N., Scott, H., Shin, H. D., & Curran, J. (2022). Timing of maternal mortality and severe morbidity during the postpartum period: A systematic review. JBI Evidence Synthesis, 20(9), 2119–2194.
4. Hollier, L. (2020). Preventing maternal mortality and morbidity. Texas Department of State Health Services.
5. Hoyert, D., & Mininio, A. (2020). Maternal Mortality in the United States: Changes in Coding, Publication and Data Release, 2018. National Vital Statistics Report.