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The United States has the highest maternal mortality rate among wealthy nations, a distinction that reflects systematic failures of the healthcare system to protect pregnant and postpartum individuals. The maternal mortality rate, defined as deaths occurring during pregnancy or within 42 days of delivery that are related to pregnancy complications, has increased over the past two decades in the United States while declining in most peer nations. The racial disparities within these already high rates are particularly alarming: Black women die from pregnancy-related causes at approximately three times the rate of white women, a disparity that holds across income levels and education levels. Understanding the causes of maternal mortality requires distinguishing between maternal deaths and severe maternal morbidity, the serious complications that do not result in death but leave women with lasting health effects. The leading direct causes of maternal death include hemorrhage, cardiovascular conditions, infection, amniotic fluid embolism, and hypertensive disorders of pregnancy including preeclampsia. But research on preventability finds that a large proportion of maternal deaths, particularly those occurring in the postpartum period, are preventable with better care and better coordination. The extended postpartum period is a particularly important focus of maternal mortality prevention. Most maternal deaths in the United States occur not in the immediate delivery period but in the days and weeks after discharge from the hospital. The conventional postpartum care model, a single six-week follow-up visit, does not adequately address the health risks of the postpartum period for many women, particularly those with chronic conditions or complex social circumstances. Research supports more frequent postpartum contact, particularly in the first weeks after discharge, to identify and address emerging complications. Racial disparities in maternal mortality reflect multiple overlapping factors. Structural racism in healthcare contributes to disparities in the quality of care received. Research documents that healthcare providers are more likely to dismiss or minimize pain and symptoms reported by Black women. Black women are more likely to experience delays in diagnosis and treatment of serious complications. The weathering hypothesis, developed by researcher Arline Geronimus, proposes that the chronic stress of living with racism accelerates biological aging in ways that increase health risks during pregnancy. Social determinants of health play a significant role in maternal mortality disparities. Housing instability, food insecurity, lack of transportation, intimate partner violence, and lack of social support all affect maternal health outcomes. Addressing these factors requires healthcare systems to connect pregnant and postpartum individuals to social services and community resources that healthcare encounters alone cannot provide. Midwifery and doula care have been associated with improved outcomes in research on birth attendant type. Evidence on midwifery-led care finds comparable or better outcomes for low-risk pregnancies compared to physician-led care, with lower rates of intervention, higher rates of vaginal birth, and higher rates of patient satisfaction. Doula support, the provision of continuous labor support by a trained companion, is associated with reduced rates of cesarean section, improved pain management, and shorter labor duration in randomized trials. Expanding access to midwifery and doula care, particularly in communities with high maternal mortality rates, represents a practical access improvement strategy. Perinatal quality improvement programs, which use structured quality improvement methods to address specific high-risk conditions in obstetric care, have shown significant results. The California Maternal Quality Care Collaborative's hemorrhage initiative, which implemented standardized protocols for recognizing and responding to postpartum hemorrhage, was associated with a significant reduction in California's maternal mortality rate from hemorrhage. Similar initiatives targeting hypertension, sepsis, and other leading causes of maternal death have produced measurable improvements where implemented. The maternal mortality review process, in which state committees review maternal deaths to identify preventable causes and quality improvement opportunities, is an important tool for learning from the cases where the system failed. Many states have established these committees, and their findings have informed policy and quality improvement initiatives. Federal support for maternal mortality review infrastructure has expanded, and the data generated by reviews are increasingly informing both state and national policy responses. Policy interventions with evidence support include Medicaid coverage expansion, which improves prenatal care access; extension of postpartum Medicaid coverage from 60 days to 12 months, which several states have implemented; investment in community health workers and doulas; training programs for providers on implicit bias and disparities; and perinatal quality improvement initiatives. Addressing maternal mortality at the level it deserves requires sustained investment in the multiple dimensions of the crisis.

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''Originally published January 6, 2020 on [https://docmoates.com/blog/maternal-mortality-in-the-united-states-causes-disparities-and-solutions/ docmoates.com].''