Causes of Maternal Mortality

Introduction to Maternal Mortality and Safe Motherhood

Maternal mortality remains a major public health challenge globally, with Sub-Saharan Africa bearing the highest burden. The World Health Organization defines maternal death as the death of a woman while pregnant or within 42 days of termination of pregnancy, from any cause related to or aggravated by the pregnancy or its management. Safe motherhood initiatives aim to ensure that all women receive the necessary care throughout pregnancy, childbirth, and the postpartum period to prevent these tragic outcomes. Midwives and nurses form the frontline of this defense in Nigerian primary health care centres.

Direct Obstetric Causes: Hemorrhage and Hypertension

Direct obstetric causes stem directly from obstetric complications during pregnancy, labor, or the puerperium.

• Postpartum Hemorrhage (PPH): Excessive bleeding after delivery, often due to uterine atony, retained placental tissue, or genital tract lacerations. It can kill a healthy woman in less than two hours if left untreated.
• Pregnancy-Induced Hypertension: Conditions such as pre-eclampsia and eclampsia involve dangerously high blood pressure spikes, putting the mother at high risk for seizures, stroke, and multi-organ failure.

Direct Obstetric Causes: Sepsis and Complications of Abortion

Infection and unsafe termination procedures claim thousands of maternal lives annually.

• Puerperal Sepsis: Bacterial invasion of the reproductive tract post-delivery or post-abortion. Poor aseptic technique during examinations or prolonged rupture of membranes greatly increases risk.
• Unsafe Abortion: Often performed in clandestine settings by unskilled providers using crude methods. This leads to severe hemorrhage, uterine perforation, and overwhelming pelvic sepsis.

Indirect Obstetric Causes: Pre-existing and Co-existing Medical Conditions

Indirect causes are medical conditions that are not direct obstetric complications, but are aggravated by the physiological demands of pregnancy. Common culprits include malaria, severe anemia, HIV/AIDS, cardiac diseases, and diabetes mellitus. For instance, pregnancy increases plasma volume and cardiac output, which can easily push a compromised heart into congestive heart failure. Similarly, malarial parasitemia in pregnant women causes severe maternal anemia and low birth weight.

The Three Delays Model in Maternal Mortality

Understanding why women die involves examining the barriers to receiving timely, life-saving care. The Three Delays framework breaks this down:

1. Delay in deciding to seek care: Caused by lack of awareness, financial constraints, or low status of women in household decision-making.
2. Delay in reaching a health facility: Stemming from poor road networks, lack of transport, and geographical isolation.
3. Delay in receiving adequate care: Resulting from understaffed clinics, lack of blood products, poor equipment, or unskilled personnel at the health facility.

Socio-Cultural, Economic, and Environmental Determinants

Beyond biological factors, social determinants heavily influence maternal survival. Poverty limits access to proper nutrition, antenatal care visits, and hospital delivery fees. Cultural practices, such as patronizing traditional birth attendants for high-risk obstructed labors, often delay medical intervention until it is too late. Gender inequality frequently leaves women without autonomy over their own reproductive health choices or financial resources.

Nursing Assessment and Identification of High-Risk Mothers

Effective risk identification during antenatal care prevents many maternal deaths. Nurses must perform thorough baseline assessments, checking for previous history of caesarean sections, grand multiparity, chronic illnesses, adolescent age, or narrow pelvic structures. Monitoring vital signs meticulously during labor helps catch early signs of shock or eclampsia long before overt collapse occurs.

Preventive Strategies and Nursing Interventions in Nigeria

Preventive nursing actions significantly reduce maternal mortality rates. Nurses promote birth preparedness and complication readiness plans during antenatal classes. Administering intermittent preventive treatment for malaria, distributing insecticide-treated nets, and ensuring active management of the third stage of labor with uterotonics are standard lifesaving practices. Community health education empowers women and families to recognize danger signs and seek care promptly.