Research shows that 98.8% of pregnant women in Ethiopia’s Tigray region have dangerously low folate levels—a B vitamin critical for preventing serious birth defects. According to Gram Research analysis of this 2025 study of 400 pregnant women, even those eating a variety of foods remained folate deficient, proving that diet alone cannot solve this public health crisis. Mandatory fortification of staple grains is needed to protect pregnancies in this high-risk region.
A new study from Ethiopia found that nearly all pregnant women in the Tigray region don’t have enough folate—a crucial vitamin that prevents serious birth defects. Researchers tested 400 pregnant women and discovered that 98.8% had dangerously low folate levels, even when they ate a variety of foods. This is especially concerning because Tigray already has one of the world’s highest rates of neural tube defects, which are serious birth defects affecting the brain and spine. The study shows that simply telling women to eat better isn’t enough—the region needs a bigger solution, like adding folate to staple grains that everyone eats.
Key Statistics
A 2025 cross-sectional study of 400 first-trimester pregnant women in Tigray, Ethiopia found that 98.8% had red blood cell folate concentrations below the WHO-recommended threshold of 400 ng/mL for optimal neural tube defect prevention.
Among 82 pregnant women in Tigray who achieved minimum dietary diversity (5+ food groups), 97.6% still remained folate deficient according to a 2025 study, demonstrating that dietary changes alone cannot address the region’s folate crisis.
A 2025 Ethiopian study of 400 pregnant women revealed that 79.5% consumed fewer than 5 different food groups daily, yet even dietary diversity showed limited association with adequate folate status in a region with one of the world’s highest neural tube defect rates.
The mean red blood cell folate concentration among 400 first-trimester pregnant women in Tigray was 221.6 ng/mL in 2025, less than 55% of the WHO-recommended 400 ng/mL threshold for preventing neural tube defects.
The Quick Take
- What they studied: How much folate (a B vitamin) pregnant women in northern Ethiopia have in their blood, and what factors affect their folate levels
- Who participated: 400 pregnant women in their first three months of pregnancy from five hospitals in the Tigray region of Ethiopia, selected randomly between March and April 2025
- Key finding: 98.8% of the pregnant women had folate levels below what’s considered safe for preventing birth defects, even though some ate a good variety of foods
- What it means for you: If you live in or care about this region, this shows that individual dietary changes alone won’t solve the problem—the government needs to add folate to common foods like grain. For pregnant women everywhere, it highlights why folate supplementation during pregnancy is so important.
The Research Details
Researchers conducted a cross-sectional study, which is like taking a snapshot in time rather than following people over months or years. They visited five public hospitals in Tigray, Ethiopia between March and April 2025 and recruited 400 pregnant women who were in their first trimester (first 13 weeks of pregnancy). Each woman answered questions about her background, diet, and health, and provided a blood sample.
The researchers measured folate levels using a precise lab test called electrochemiluminescence immunoassay, which detects the actual amount of folate stored in red blood cells. This is considered the gold standard for measuring long-term folate status because it shows what the body has stored over time, not just what someone ate that day. They also assessed dietary diversity using a standard tool that counts how many different food groups a woman ate in the previous 24 hours.
Because almost all the women had low folate (making folate sufficiency very rare), the researchers used a special statistical method called Ridge regression to identify which factors were most strongly connected to having adequate folate levels.
This research approach matters because measuring folate in red blood cells is much more reliable than just asking women what they eat. It shows the actual nutritional status of their bodies. By studying pregnant women specifically in their first trimester—when the baby’s brain and spine are developing—the researchers captured the group at highest risk for neural tube defects. The cross-sectional design allowed them to quickly identify a major public health problem in a region where birth defects are already common.
This study has several strengths: it used a large sample size (400 women), employed systematic random sampling to avoid bias, measured actual blood folate levels rather than relying on self-reported diet, and was conducted in a real-world hospital setting. However, it’s a snapshot study, so it can’t prove cause-and-effect relationships. The study was conducted over just two months, so results may not represent all seasons. The researchers acknowledge that individual-level dietary changes weren’t enough to fix the problem, suggesting the issue is structural rather than personal.
What the Results Show
The study found that pregnant women in Tigray have critically low folate levels. The average folate level was 221.6 ng/mL, but the World Health Organization recommends at least 400 ng/mL for optimal protection against neural tube defects. An alarming 98.8% of the 400 women tested—that’s 395 out of 400—had folate levels below this safe threshold.
Even more striking, 79.5% of women (318 out of 400) weren’t eating enough variety—they consumed fewer than 5 different food groups daily. However, even among the women who did eat a diverse diet with 5 or more food groups, 97.6% still had dangerously low folate. This suggests that the problem isn’t simply about what women choose to eat; something bigger is preventing them from getting enough folate.
The researchers found two factors connected to better folate levels: women who achieved dietary diversity were more likely to have adequate folate (though still rare), and younger women tended to have slightly better folate status than older women. However, these factors only made small differences in a population where folate deficiency is nearly universal.
The study revealed that folate deficiency crosses all demographic groups—it’s not limited to poor women, uneducated women, or those eating poorly. Even women with better diets and higher dietary diversity were folate deficient. This finding is crucial because it shows the problem isn’t about individual choices or behaviors, but rather a systemic issue with food availability or quality in the region. The inverse relationship with maternal age (older women having slightly lower folate) may reflect cumulative nutritional stress over time.
According to Gram Research analysis, this study confirms what other research has suggested: regions with high rates of neural tube defects often have widespread folate deficiency. The finding that 98.8% of women are deficient is consistent with previous studies showing that Tigray has one of the world’s highest rates of neural tube defects. However, this study goes further by showing that dietary diversity alone doesn’t solve the problem, which challenges the common assumption that nutrition education is sufficient. The research supports previous calls for mandatory food fortification as a public health intervention.
This study has several important limitations. First, it only included women who came to hospitals, so it may not represent all pregnant women in the region—some women may not have access to hospitals. Second, it was conducted over just two months (March-April 2025), so it doesn’t show whether folate levels change by season. Third, the study is a snapshot in time, so it can’t prove that low folate actually causes neural tube defects in these women, only that the two are connected. Fourth, the researchers didn’t measure other factors that might affect folate, like certain medications or health conditions. Finally, the study was conducted in one region of Ethiopia, so results may not apply to other areas.
The Bottom Line
For pregnant women in Tigray and similar regions: Folate supplementation is essential and should begin before pregnancy if possible. The evidence is strong (confidence: very high) that supplementation can prevent neural tube defects. For policymakers: Mandatory fortification of staple grains with folate is urgently needed, as individual dietary changes have proven insufficient. For healthcare providers: Screen all pregnant women for folate deficiency and provide supplementation regardless of dietary intake, since diet alone won’t solve this problem.
Pregnant women and women planning pregnancy in Tigray and similar regions should care most about this research. Healthcare providers, public health officials, and policymakers in areas with high rates of neural tube defects should prioritize this issue. Women in developed countries with mandatory food fortification have much lower risk, but this research reminds us why fortification programs are so important. Anyone concerned about global maternal and child health should care about this finding.
Folate supplementation can begin working immediately to build up body stores, but the critical window is the first 28 days of pregnancy when the neural tube is forming—before many women even know they’re pregnant. This is why women of childbearing age in high-risk regions should take folate supplements continuously. Large-scale food fortification programs typically take 1-2 years to implement but would provide ongoing protection for all women in the population.
Frequently Asked Questions
Why is folate so important during pregnancy?
Folate is a B vitamin that helps build the baby’s brain and spine during the first weeks of pregnancy. Without enough folate, babies can develop neural tube defects—serious birth defects affecting the spine and brain. This is why folate is critical before and during early pregnancy.
Can pregnant women get enough folate just by eating healthy food?
Not always, especially in regions like Tigray where this study was conducted. Even women eating a variety of foods had dangerously low folate levels. This is why supplements are essential for pregnant women, particularly in areas where food fortification isn’t yet mandatory.
What does red blood cell folate measure that’s different from regular blood tests?
Red blood cell folate shows your body’s folate stores built up over months, while regular blood folate only shows what you ate recently. It’s a better indicator of long-term nutritional status and risk for birth defects, which is why doctors consider it the gold standard.
How can governments solve folate deficiency in pregnant women?
Adding folate to staple grains like wheat and corn through mandatory food fortification is the most effective solution. This ensures all women get folate regardless of their diet choices or access to supplements, protecting entire populations from neural tube defects.
Does this study apply to pregnant women in other countries?
This study was conducted in Ethiopia’s Tigray region, which has particularly high rates of neural tube defects. However, the findings are relevant to any region without mandatory grain fortification. Countries with fortification programs have much lower folate deficiency rates.
Want to Apply This Research?
- Track daily folate supplement intake (yes/no) and dietary diversity score (number of food groups consumed daily). Set a goal of 5+ food groups daily and 100% supplement adherence.
- Users should set a daily reminder to take their folate supplement at the same time each day. They can also log the different food groups they eat each day to work toward the 5+ group minimum, understanding that supplements are still necessary even with good diet.
- Monthly check-ins to review supplement adherence rate and average dietary diversity score. Users can photograph meals to verify food group variety. For pregnant women in high-risk regions, blood folate testing at each prenatal visit would be ideal to confirm supplementation is working.
This research describes a serious public health situation in a specific region of Ethiopia and should not be interpreted as applying to all pregnant women globally. Pregnant women in countries with mandatory grain fortification have significantly lower folate deficiency rates. All pregnant women should consult with their healthcare provider about appropriate folate supplementation based on their individual circumstances, local food supply, and regional health guidelines. This article is for educational purposes and does not replace medical advice from a qualified healthcare professional. If you are pregnant or planning pregnancy, discuss folate supplementation with your doctor immediately.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.