By Iroyin Yoruba Television
A renewed focus on high blood pressure during pregnancy is drawing attention to one of the complications that can threaten both mothers and babies in Nigeria, with evidence showing that hypertensive disorders remain an important concern across the country's maternity care system.
The issue has received fresh attention following the publication of findings highlighting the burden of pregnancy-related hypertension among women receiving care in Nigerian referral hospitals. The research, involving more than 71,000 women across 54 referral-level facilities, found that 6.4 per cent had a hypertensive disorder during pregnancy.
Although the underlying study examined patients treated between 2019 and 2020 and therefore should not be interpreted as a real-time national prevalence estimate for 2026, its findings provide important evidence about the risks doctors encounter when managing pregnancies complicated by high blood pressure.
WHY PREGNANCY-RELATED HYPERTENSION MATTERS
Hypertensive disorders of pregnancy cover several conditions, including chronic hypertension, gestational hypertension, pre-eclampsia and eclampsia. They can develop during pregnancy or involve women who already have high blood pressure before becoming pregnant.
The danger is that some women may initially have few or no obvious symptoms. Without regular antenatal monitoring, a problem that begins with elevated blood pressure can progress into a medical emergency.
The Nigerian study found that gestational hypertension represented 49.8 per cent of the hypertensive disorders identified among the affected women. Chronic hypertension in pregnancy accounted for 33.3 per cent, while pre-eclampsia accounted for 9.5 per cent and eclampsia for 7.0 per cent.
These conditions are not simply numbers recorded during antenatal visits. Severe hypertension can affect several organs and can create serious complications for both the pregnant woman and her unborn child.
Pre-eclampsia, for example, can involve high blood pressure and other signs of organ involvement. If it becomes severe and is not treated, it can progress to eclampsia, a condition associated with seizures and significant risks to the mother and baby.
The study reported that 3.7 per cent of women with hypertensive disorders died, while eclampsia recorded the highest case-fatality rate among the hypertensive conditions examined. Stillbirth occurred in 11.9 per cent of pregnancies involving hypertensive disorders in the study population.
WHAT THE NIGERIAN EVIDENCE SHOWS
The research was conducted using data from the Maternal and Perinatal Database for Quality, Equity and Dignity, covering 54 referral-level facilities across Nigeria's six geopolitical zones.
Researchers analysed information involving 71,758 women whose pregnancies ended or who were admitted within 42 days after delivery during the study period.
The size of the dataset makes the findings useful for understanding patterns in Nigerian tertiary and referral-level maternity care, although the researchers also identified limitations. For example, the study did not contain information on some potentially important factors, including body mass index, pregnancy interval, family history and whether women with hypertensive disorders received low-dose aspirin.
Researchers identified several characteristics associated with increased odds of hypertensive disorders.
Women older than 35 had higher odds compared with younger age groups. The analysis also found associations with lack of formal education or only primary education, having no previous birth, having many previous births, previous Caesarean section and previous miscarriage.
These findings should not be interpreted to mean that every woman with one of these characteristics will develop pregnancy-related hypertension. Instead, they indicate groups that may require particularly careful clinical assessment and monitoring.
THE IMPORTANCE OF ANTENATAL CARE
One of the most important messages from the evidence is the value of detecting hypertension before it becomes severe.
Blood pressure measurement is a routine component of antenatal care and can provide an early warning that something may be wrong. Health professionals can also assess symptoms, monitor the mother's condition, evaluate the baby's wellbeing and determine whether additional investigations or treatment are required.
For pregnant women, attending scheduled antenatal appointments can therefore provide opportunities for problems to be identified before they become emergencies.
The research found that absence of antenatal care during the pregnancy was among factors associated with maternal death in women affected by hypertensive disorders.
This makes access to maternity services particularly important in communities where distance, transport costs, household finances, limited health facilities or other barriers may prevent women from attending care regularly.
The challenge is not only getting women into hospitals when complications become severe. It is also ensuring that women can enter the health system early enough for health workers to identify risks, provide preventive care and establish appropriate follow-up.
RECOGNISING WARNING SIGNS
Pregnant women and their families also have a role to play in recognising symptoms that require urgent medical attention.
Severe headache, changes in vision, severe abdominal or upper abdominal pain, sudden swelling, difficulty breathing, confusion, seizures or other unusual symptoms during pregnancy should not simply be dismissed as normal pregnancy discomfort.
However, symptoms alone cannot reliably identify every case. Some women with high blood pressure may not feel seriously ill, which is why routine blood pressure checks and professional assessment remain important.
The absence of obvious symptoms should therefore not be taken as proof that blood pressure is normal.
When a woman develops a serious hypertensive disorder, healthcare workers may need to monitor her blood pressure and other clinical indicators closely and decide whether medication, additional testing, hospital admission or delivery is required.
The appropriate treatment depends on the woman's condition, gestational age and the health of the fetus, meaning that management should be guided by qualified medical professionals rather than self-medication.
WHY EDUCATION AND INFORMATION MATTER
The association between educational level and hypertensive disorders identified in the Nigerian research also highlights the broader relationship between health information and access to care.
Education alone does not determine whether a woman will develop high blood pressure. However, health literacy can influence whether warning signs are recognised, whether antenatal appointments are attended and whether medical advice is understood and followed.
Community health programmes can therefore help by providing clear information about pregnancy danger signs, the importance of antenatal care and the need to seek professional assistance when symptoms develop.
Information should also reach husbands, relatives and other household decision-makers because pregnancy emergencies can require rapid decisions about transportation, finances and access to healthcare.
In areas where women depend on family members before travelling to a hospital, awareness among the wider household can make a difference.
THE ROLE OF HEALTH FACILITIES
The responsibility does not rest with pregnant women alone.
Health facilities need the personnel, equipment, medicines and referral systems required to manage pregnancy complications.
A woman whose condition becomes severe may need rapid assessment and treatment. Delays at any stage—from recognising the problem to reaching a health facility or receiving appropriate treatment—can increase the danger.
Strengthening primary healthcare services can help ensure that abnormalities are detected early, while referral hospitals need the capacity to manage complicated cases.
Nigeria's wider health system also faces the challenge of ensuring that women in rural and underserved communities can access maternity services without facing prohibitive financial or geographical barriers.
The study's researchers concluded that evidence-based interventions focused on early identification of pre-eclampsia and timely treatment are important for improving outcomes for mothers and babies.
A WARNING WITHOUT PANIC
The new attention surrounding pregnancy-related hypertension should not create unnecessary fear among expectant mothers.
Most pregnant women will not develop the severe complications described in the study. In addition, the research is based on women who received care in referral-level facilities during an earlier period and cannot by itself establish the current prevalence across every Nigerian community.
Its value is instead in demonstrating why pregnancy-related hypertension deserves continued attention within maternal healthcare.
The findings also show why doctors and policymakers need reliable data to identify where complications occur, which women are most at risk and where gaps in care may exist.
For individual pregnant women, the practical message is straightforward: regular antenatal care, professional blood-pressure monitoring and prompt medical attention when warning signs appear can provide important opportunities to identify problems