Women over age 40 are almost five times more likely to die during pregnancy or within the first six weeks after giving birth compared to women under 25, according to 2023 CDC data. The maternal mortality rate for women over 40 was 59.8 deaths per 100,000 live births, compared to just 12.5 for women under 25. This stark disparity reflects a troubling reality as more women delay childbearing into their late 30s and beyond.

The trend toward later motherhood has accelerated dramatically. In 1970, the average first-time mother was 21 years old. By 2020, that age had climbed to 27, with 19% of all pregnancies and 11% of first-time pregnancies occurring in women aged 35 and older. While delayed childbearing is a personal choice many women make for career, financial, or relationship reasons, the biological reality is that pregnancy becomes riskier as women age.

Why Do Older Mothers Face Such Higher Risks?

The primary culprit behind elevated maternal mortality in women over 40 is the prevalence of chronic health conditions that worsen during pregnancy. A small 2010 study of pregnant women over 45 found significantly higher rates of high blood pressure, diabetes, cesarean sections, placenta previa, and postpartum hemorrhage compared to younger women. These preexisting conditions don't just increase discomfort; they can become life-threatening during pregnancy and the postpartum period.

Older mothers are also more likely to experience multiple pregnancies, which carry additional risks. This occurs for two reasons: women naturally have a higher chance of conceiving twins as they age, and women who experienced infertility often turn to assisted reproductive technologies like in vitro fertilization (IVF), which increases the likelihood of multiples. Mothers carrying multiples face elevated risks of high blood pressure, preeclampsia, gestational diabetes, and postpartum hemorrhage.

The timing of death is particularly important to understand. According to a 2018 review of maternal mortality cases, 45% of deaths occurred in the first six weeks after birth, compared to 37.6% during pregnancy itself. This means the postpartum period is when older mothers face their greatest vulnerability.

What Are the Leading Causes of Maternal Death?

Regardless of age, certain complications account for the majority of maternal deaths. The top causes include:

• Postpartum hemorrhage: Uncontrolled bleeding after delivery, responsible for 14% of maternal deaths
• Cardiovascular and coronary conditions: Heart and blood vessel problems tied at 14% of deaths
• Infection: Sepsis and other infections accounting for 10.7% of deaths
• Cardiomyopathy: Heart muscle disease responsible for 10.7% of deaths
• Amniotic fluid embolism: A rare but serious condition where amniotic fluid enters the bloodstream, causing 8.4% of deaths
• Preeclampsia and eclampsia: Dangerous high blood pressure conditions accounting for 7.4% of deaths
• Mental health conditions: Including postpartum depression and suicide, responsible for 7% of deaths

For Black mothers over 40, the crisis is even more severe. The maternal mortality rate for this group was 239.9 deaths per 100,000 live births in 2023, reflecting both age-related risks and systemic healthcare disparities.

How Can Older Mothers Reduce Their Risk?

It's crucial to emphasize that increased risk does not mean older mothers are likely to die. Rather, their risk is statistically higher than younger women's. Several evidence-based strategies can help reduce these risks:

• Reproductive life planning: Working with healthcare providers before conception to manage chronic conditions like diabetes and hypertension, ensuring optimal health status before pregnancy begins
• Access to midwifery care: For pregnant women whose only risk factor is age, midwives and doulas may provide more personalized attention and support during labor and delivery
• Enhanced postpartum monitoring: More frequent in-home postpartum visits, particularly at or by three weeks after birth, to catch complications before they become life-threatening
• Avoiding unnecessary cesarean sections: Ensuring that every C-section is medically necessary, as surgery carries its own risks
• Community support systems: Access to lactation consultants, postpartum doulas, and direct primary care physicians who can visit the home and monitor recovery

New Jersey's nurse home visitor program exemplifies how proactive postpartum care can save lives. By bringing trained healthcare professionals into the home during the critical early weeks, these programs can identify physical or mental health problems before they escalate to fatal complications.

What Role Does Preconception Health Planning Play?

For women considering pregnancy after 40, preconception health planning becomes essential. This involves working with healthcare providers to manage or optimize any existing conditions. Women with diabetes, hypertension, or obesity should discuss how these conditions might affect pregnancy and what steps can be taken to minimize risks. This might include medication adjustments, lifestyle changes, or additional monitoring during pregnancy.

The American College of Obstetricians and Gynecologists (ACOG) acknowledges that the age 35 threshold for "advanced maternal age" is somewhat arbitrary, originally based on research about miscarriage and chromosomal abnormalities in babies rather than maternal health risks. However, the organization also notes that chronic medical conditions like diabetes, hypertension, and obesity do increase pregnancy-related complications as women age.

The good news is that 2023 data showed improvement compared to 2022, when the maternal mortality rate for women over 40 reached a concerning 87.1 deaths per 100,000 live births. The 2023 rate of 59.8 represents a return to 2018 levels, suggesting that increased awareness and targeted interventions may be making a difference. However, rates remain unacceptably high, particularly for Black women, underscoring the need for continued efforts to improve maternal healthcare access and quality across all communities.

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