Maternal mortality — the death of a woman during pregnancy, childbirth, or the postpartum period — remains one of the starkest health disparities globally, with the vast majority of deaths occurring in low- and middle-income countries and largely from causes research has identified as preventable. Understanding what the evidence shows about leading causes and effective interventions is essential to continued progress in this area.
The Global Scale of the Problem
Research consistently shows that global maternal mortality rates have declined substantially over recent decades, reflecting genuine progress from expanded healthcare access and targeted interventions. Despite this progress, significant disparities persist, with maternal mortality rates in the highest-risk regions remaining many times higher than in high-income countries — a gap research attributes primarily to differences in access to skilled birth attendance and emergency obstetric care, rather than differences in underlying biological risk.
Leading Causes Identified by Research
Postpartum Hemorrhage
Severe bleeding after childbirth is consistently identified as one of the leading causes of maternal death globally, particularly in settings without immediate access to blood transfusion capacity and emergency surgical intervention.
Hypertensive Disorders of Pregnancy
Conditions including preeclampsia and eclampsia represent another major cause of maternal mortality, with research showing that timely detection through routine blood pressure monitoring and appropriate management can substantially reduce associated mortality risk.
Sepsis and Infection
Postpartum infections remain a significant cause of maternal death, particularly in settings with limited access to timely antibiotic treatment and infection prevention practices during delivery.
Unsafe Abortion
Research consistently identifies complications from unsafe abortion as a preventable contributor to maternal mortality in settings where access to safe abortion care and post-abortion care is limited.
Indirect Causes
Pre-existing conditions — including cardiovascular disease, diabetes, and infections such as HIV and malaria — that are worsened by pregnancy also contribute meaningfully to maternal mortality, highlighting the importance of integrated care that addresses overall maternal health, not obstetric risk factors alone.
Interventions With Strong Research Support
Skilled Birth Attendance
Among the most consistently supported findings in maternal health research is the strong association between skilled birth attendance — care provided by a trained midwife, nurse, or physician during delivery — and reduced maternal mortality risk, making expansion of skilled attendance a central focus of global maternal health strategy.
Emergency Obstetric Care Access
Research shows that timely access to emergency obstetric care — including cesarean delivery capacity, blood transfusion services, and management of obstetric emergencies — is critical for addressing complications that arise unpredictably during labor and delivery, even in otherwise low-risk pregnancies.
Antenatal Care
Studies consistently link adequate antenatal care attendance with earlier detection of pregnancy complications such as preeclampsia, gestational diabetes, and fetal growth concerns, enabling earlier intervention before complications become life-threatening.
Postpartum Care
Because a substantial proportion of maternal deaths occur in the postpartum period, research increasingly emphasizes the importance of structured postpartum follow-up care, rather than considering the immediate delivery period as the primary risk window alone.
Community Health Worker Programs
In settings with limited formal healthcare infrastructure, research supports community health worker programs — providing antenatal education, danger sign recognition, and referral facilitation — as an effective strategy for extending maternal health support beyond facility-based care alone.
Racial and Socioeconomic Disparities Within Countries
Even within high-income countries, research documents significant maternal mortality disparities by race and socioeconomic status, indicating that structural factors — including access to quality care, implicit bias in clinical treatment, and social determinants of health — contribute to maternal mortality risk beyond national-level averages alone.
Family Planning Access as a Prevention Strategy
Research consistently identifies access to voluntary family planning as an important, though sometimes underemphasized, component of maternal mortality prevention. By enabling women to plan pregnancy timing and spacing, family planning access is associated with reduced exposure to pregnancy-related mortality risk over a woman’s reproductive lifespan, and with reduced rates of high-risk pregnancies among adolescents and women with closely spaced prior pregnancies. Studies examining regions with expanded family planning access alongside skilled birth attendance investment show larger maternal mortality reductions than either intervention implemented in isolation, suggesting these strategies work best as complementary components of a broader maternal health strategy rather than substitutes for one another.
The Role of Maternal Health Data Systems
Research on maternal mortality measurement itself highlights a persistent challenge: many maternal deaths, particularly in lower-resource settings, are not accurately captured in routine health data systems, especially deaths occurring outside formal healthcare facilities. Maternal death surveillance and response systems — structured processes for identifying, reviewing, and learning from individual maternal deaths — have shown promise in research for both improving data accuracy and directly informing local quality improvement efforts, by identifying specific, addressable failure points in the chain of care that led to a particular death.
Research Gaps Worth Addressing
- Implementation research on scaling skilled birth attendance in the most under-resourced settings
- Research addressing racial and socioeconomic maternal mortality disparities within high-income countries
- Long-term maternal health outcomes research extending beyond the immediate postpartum period
- Research on mental health support integration within maternal healthcare, given the significant contribution of mental health conditions to maternal mortality in some settings
Adolescent Pregnancy as a Distinct Risk Category
Research consistently identifies adolescent pregnancy as carrying elevated maternal mortality and morbidity risk compared to pregnancy in adulthood, reflecting both physiological factors related to a still-developing body and social factors such as reduced likelihood of accessing antenatal care. Given that adolescent pregnancy remains common in many regions with otherwise limited maternal health resources, research on interventions specifically addressing this population — including education access, delayed marriage initiatives, and adolescent-specific maternal health services — represents an important and somewhat distinct strand within the broader maternal mortality prevention literature.
Contributing to This Field
Maternal health research falls within the scope of Obstetrics/Gynaecology and Public Health as published by journals like IJMS. If you have original research or review papers addressing maternal mortality prevention, review the IJMS Scope and submit through the Paper Submission page.
Final Thoughts
Maternal mortality remains one of the clearest examples of a largely preventable health disparity, with research consistently pointing to access-related rather than purely biological factors as the primary driver of persistent gaps. Continued investment in skilled birth attendance, emergency obstetric care, and postpartum support remains essential to further progress.
For current global maternal mortality data, see the World Health Organization’s maternal health resources.