Maternal mortality refers to the death of a woman during pregnancy, childbirth, or within 42 days after the end of a pregnancy, from any cause related to or worsened by the pregnancy itself. In 2023, about 260,000 women worldwide died this way, translating to more than 700 preventable deaths every day. Despite decades of progress, maternal mortality remains one of the sharpest indicators of inequality in global health.
How Maternal Mortality Is Defined
The World Health Organization defines a maternal death as any female death caused by or aggravated by pregnancy or its management, excluding accidents and unrelated injuries. The 42-day window after delivery or pregnancy loss is the standard cutoff. Deaths that occur after 42 days but within a year of pregnancy’s end are sometimes tracked separately as “late maternal deaths,” but they fall outside the formal count used in most global statistics.
The key metric is the maternal mortality ratio, or MMR: the number of maternal deaths per 100,000 live births. The global MMR in 2023 was 197 per 100,000 live births. That number has dropped roughly 40% since 2000, but it remains far above the United Nations target of fewer than 70 per 100,000 by 2030.
Leading Causes of Maternal Death
About 73% of all maternal deaths stem from direct obstetric causes, meaning complications of the pregnancy itself. A WHO systematic analysis covering 2003 to 2009 broke these down:
- Severe bleeding (hemorrhage): 27% of all maternal deaths, making it the single largest killer. This most often happens during or immediately after delivery.
- Hypertensive disorders: 14%, including dangerously high blood pressure and conditions like preeclampsia and eclampsia.
- Sepsis (infection): 11%, typically from infections that develop during labor, delivery, or the postpartum period.
- Unsafe abortion: 8%, almost entirely concentrated in countries where safe abortion care is restricted or unavailable.
- Embolism: 3%, where a blood clot travels to the lungs or brain.
The remaining roughly 27% of maternal deaths are classified as indirect causes. These are pre-existing conditions or illnesses that worsen because of the physical demands pregnancy places on the body. Heart disease, diabetes, kidney disease, sickle cell anemia, and infections like influenza all fall into this category. As direct obstetric care improves in many countries, indirect causes are making up a growing share of maternal deaths.
Where the Burden Falls Hardest
The gap between wealthy and poor countries is enormous. In 2023, women in low-income countries faced a maternal mortality ratio of 346 per 100,000 live births. In high-income countries, that number was 10 per 100,000. That means a woman in a low-income country is roughly 35 times more likely to die from pregnancy-related causes.
Conflict makes things worse. In areas experiencing active conflict, the MMR reaches 504 per 100,000, more than five times the rate in stable settings. The collapse of health infrastructure, displacement, and loss of skilled birth attendants all drive these numbers up.
Racial Disparities in the United States
The United States is an outlier among wealthy nations, with maternal mortality rates far higher than those of peer countries. In 2023, the overall picture broke down sharply along racial lines. Black women died at a rate of 50.3 per 100,000 live births, compared to 14.5 for White women, 12.4 for Hispanic women, and 10.7 for Asian women. That means Black women are roughly 3.5 times more likely to die from pregnancy-related causes than White women.
This disparity persists even when controlling for income and education. Research points to a web of structural factors: racial segregation in housing, a shortage of obstetric providers in predominantly Black and low-income communities, higher rates of chronic stress from discrimination, and less access to timely postpartum care. These are not individual risk factors so much as systemic ones, shaped by decades of policy decisions around housing, education funding, wages, and healthcare access.
Most Deaths Are Preventable
More than 80% of pregnancy-related deaths in the United States are considered preventable, meaning there was at least some chance the death could have been avoided through reasonable changes at the patient, provider, hospital, or community level. That figure is striking because it means the problem is not primarily a lack of medical knowledge. The interventions that prevent maternal death are well understood: access to skilled birth attendants, timely treatment of hemorrhage and high blood pressure, clean delivery environments, and consistent postpartum follow-up.
The challenge is delivery. In many low-income countries, women give birth without a trained provider present, or hours from a facility that can perform an emergency blood transfusion or cesarean section. In wealthier countries like the United States, the barriers are different but no less real. They include gaps in insurance coverage, fragmented care between pregnancy and the postpartum period, implicit bias in how providers assess pain and symptoms in Black and Indigenous women, and the concentration of hospital closures in rural and underserved areas.
What Drives the Numbers Down
The 40% global decline since 2000 has not been evenly distributed, but it shows what works. Countries that have dramatically reduced maternal mortality share a few common threads: universal or near-universal access to prenatal care, a high percentage of births attended by skilled health workers, functioning referral systems so complications can be escalated quickly, and access to contraception so women can space pregnancies and avoid unintended ones.
At the policy level, improvements in education, living wages, paid family leave, and food security for low-income families all correlate with better maternal outcomes. These social conditions shape a woman’s health long before she becomes pregnant. Chronic conditions like hypertension, diabetes, and obesity, which increase pregnancy risk, are themselves products of the environments people live in. Addressing maternal mortality ultimately means addressing the broader conditions that determine health.