1. Global, regional, and national levels of maternal mortality, 1990-2015: a systematic analysis for the Global Burden of Disease Study 2015;GBD 2015 Maternal Mortality Collaborators;Lancet,2016
2. Pregnancy-Related Mortality in the United States, 2011-2013;Obstet Gynecol,2017
3. CDC.gov [Internet]. Washington, D.C.: US Department of Health & Human Services; 2022. Pregnancy-Related Deaths in the United States; 2022 Feb [cited 2022 April 23]. Available from: https://www.cdc.gov/hearher/pregnancy-related-deaths/index.html#:~:text=Almost%20two%20thirds%20of%20pregnancy,quality%20care%20can%20save%20lives
4. Preventing Complications in Pregnant Women With Cardiac Disease;J Am Coll Cardiol,2020
5. Adverse pregnancy outcomes and future maternal cardiovascular disease;Clin Cardiol,2018