Maternal undernutrition during pregnancy causes permanent changes in DNA methylation patterns in offspring muscle tissue that persist long after birth, according to a 2026 study in Scientific Reports. Researchers found that calves born to severely underfed pregnant cows had over 13,000 lasting methylation changes in their muscle cells at 300 days of age, even though they received adequate nutrition after birth. These epigenetic changes affected genes controlling muscle development, protein function, and metabolism, suggesting that a mother’s nutrition during pregnancy can have lifelong effects on her offspring’s muscle health and growth efficiency.
A new study shows that when pregnant cows don’t get enough food, it creates lasting changes in their calves’ muscle cells—even after the calves are born and fed well. Researchers found that maternal undernutrition during pregnancy altered DNA methylation patterns (a way cells control which genes turn on and off) in the muscle tissue of young cattle. These changes persisted months after birth, suggesting that a mother’s nutrition during pregnancy can have long-lasting effects on her offspring’s muscle development and meat quality. According to Gram Research analysis, this discovery highlights how early-life nutrition influences lifelong health through epigenetic mechanisms.
Key Statistics
A 2026 study published in Scientific Reports found that calves born to underfed pregnant cows (receiving 60% of nutritional requirements) had 7,076 hypomethylated and 6,104 hypermethylated regions in muscle tissue compared to calves from well-nourished mothers, with these changes persisting at 300 days of age.
Maternal undernutrition during pregnancy altered DNA methylation in over 13,000 genomic regions in offspring muscle tissue, with promoter regions showing the greatest susceptibility to methylation changes at 0.96-1.09% affected, according to whole-genome bisulfite sequencing analysis.
Research reviewed by Gram shows that genes affected by maternal undernutrition-induced methylation changes were specifically involved in gene expression regulation, protein function, cell development, and muscle organization, suggesting targeted disruption of muscle-critical biological processes.
A 2026 analysis of eight Wagyu cattle identified seven candidate epigenetically regulated genes linking maternal nutrition to offspring muscle development, including NEDD4 and SLC30A1, which control cell development and zinc transport.
The Quick Take
- What they studied: Whether a pregnant cow’s poor nutrition causes permanent changes in her calf’s muscle cells that last into adulthood
- Who participated: Eight pregnant Wagyu cows (a beef cattle breed): four received normal nutrition and four received only half the food they needed during pregnancy. Their calves were all fed the same healthy diet after birth.
- Key finding: Calves born to underfed mothers had over 13,000 changes in their DNA methylation patterns—the chemical switches that control which genes are active in muscle cells. These changes were still present at 300 days of age, even though the calves received proper nutrition after birth.
- What it means for you: This research suggests that a mother’s nutrition during pregnancy can have lifelong effects on her child’s muscle development and metabolism. While this study was in cattle, it raises important questions about human pregnancy nutrition and long-term health outcomes.
The Research Details
Researchers divided pregnant Wagyu cows into two groups: one group received 120% of the nutrition they needed (normal), while the other received only 60% (severely underfed). They kept this diet difference going from day 35 of pregnancy until the calves were born. After birth, all calves received identical, healthy diets. When the calves were 300 days old (about 10 months), researchers took small muscle samples and analyzed the DNA methylation patterns—essentially reading the chemical instructions that tell cells which genes to use.
DNA methylation is like a dimmer switch on a light bulb. Instead of genes being completely on or off, methylation can turn them up or down. The researchers used advanced sequencing technology to map every single methylation change across the entire genome in the muscle cells. This allowed them to see exactly which genes were affected and how severely.
This research approach is important because it shows that nutritional stress during pregnancy doesn’t just affect the developing fetus temporarily—it creates permanent changes at the molecular level that persist long after birth. By studying the actual DNA methylation patterns, researchers can understand the biological mechanism behind why maternal nutrition matters so much. This helps explain why some health problems seem to start before birth and continue throughout life.
This study was published in Scientific Reports, a peer-reviewed journal with a strong reputation. The researchers used state-of-the-art whole-genome bisulfite sequencing, which is the gold standard for measuring DNA methylation. However, the sample size was small (only 8 pregnant cows total), so results should be confirmed in larger studies. The findings are specific to cattle, so applying them to humans requires caution. The study was well-designed with clear controls—all calves received identical nutrition after birth, which strengthens the conclusion that the differences came from maternal nutrition, not postnatal factors.
What the Results Show
The most striking finding was the sheer number of DNA methylation changes: over 13,000 regions of the genome showed different methylation patterns in calves born to underfed mothers compared to calves born to well-fed mothers. Of these, about 7,076 regions had less methylation (hypomethylated) and 6,104 had more methylation (hypermethylated). The researchers set a strict threshold—only counting changes where the methylation difference was greater than 20%—so these are substantial, meaningful changes.
The changes weren’t random across the genome. They were concentrated in specific regions that control gene activity, particularly in promoter regions (the “on switch” for genes) and in areas just before genes start. About 1% of promoter regions showed reduced methylation in the underfed group. These promoter regions are especially important because they directly control whether genes get turned on or off.
When researchers looked at which genes were affected, they found that the altered genes were involved in critical biological processes: controlling how genes are expressed, building and maintaining proteins, developing cells and tissues, organizing muscle structure, and developing the nervous system. This suggests that maternal undernutrition doesn’t just cause random damage—it specifically disrupts genes involved in muscle development and function.
Through additional analysis combining DNA methylation data with gene expression data, researchers identified seven specific genes that appeared to be epigenetically regulated by maternal nutrition. Two particularly important ones were NEDD4 (neuronal precursor cell-expressed developmentally downregulated 4) and SLC30A1 (a zinc transporter). These genes are involved in cell development and nutrient transport, both critical for muscle growth. The fact that these genes showed both methylation changes and altered expression levels suggests they may be key mechanisms linking maternal nutrition to long-term muscle development.
This study builds on decades of research showing that maternal nutrition affects offspring health—a concept called the “fetal programming hypothesis.” Previous studies showed these effects exist, but this research goes deeper by identifying the specific epigenetic mechanisms involved. Earlier work suggested DNA methylation might be involved, but this is one of the first studies to map the complete genome-wide methylation changes caused by maternal undernutrition in livestock muscle tissue. The findings align with human studies showing that maternal malnutrition during pregnancy is associated with metabolic problems in offspring later in life.
The sample size was very small—only four pregnant cows in each group. While the findings are clear, larger studies are needed to confirm these results. The study only looked at one type of muscle (longissimus thoracis, a back muscle) at one time point (300 days of age). It’s unclear whether these methylation changes persist even longer or whether they affect other tissues. The study was conducted in cattle, so we cannot directly apply these findings to humans without additional research. Finally, while the researchers identified 13,000+ methylation changes, they could only confirm that seven genes were actually being regulated by these changes, suggesting that many of the methylation changes may not have functional consequences.
The Bottom Line
For pregnant individuals: Adequate nutrition during pregnancy is critical and may have lifelong effects on offspring muscle development and metabolism. Ensure sufficient calorie and nutrient intake, particularly protein, vitamins, and minerals. For livestock producers: Maintaining proper nutrition in pregnant animals, even when feed is expensive, may improve long-term meat quality and growth efficiency in offspring. These recommendations are supported by strong biological evidence, though human studies are still needed to confirm the exact implications.
Pregnant people and those planning pregnancy should care about this research because it demonstrates that maternal nutrition during pregnancy can cause permanent changes in offspring physiology. Livestock producers should care because it suggests that investing in proper maternal nutrition may improve long-term productivity and meat quality. Healthcare providers should use this as motivation to emphasize nutrition counseling during pregnancy. People interested in epigenetics and developmental biology will find this research particularly relevant.
The methylation changes induced during pregnancy persisted for at least 300 days (10 months) in this study. In humans, this would suggest that effects could last years or even a lifetime. However, the exact timeline for humans is unknown and requires further research. Benefits of improved maternal nutrition would likely be seen in offspring growth and development over months to years, not immediately.
Frequently Asked Questions
Can a mother’s poor nutrition during pregnancy cause permanent damage to her baby’s muscles?
Research suggests yes. A 2026 study found that maternal undernutrition creates lasting changes in DNA methylation—chemical switches controlling genes—in offspring muscle tissue. These changes persisted months after birth even when calves received proper nutrition afterward, indicating permanent epigenetic alterations.
How long do the effects of maternal malnutrition last in a child?
This study tracked effects to 300 days of age (about 10 months), where methylation changes were still present. The exact duration in humans is unknown, but evidence suggests effects could persist for years or potentially a lifetime, requiring long-term human studies to confirm.
What specific genes are affected when a pregnant mother doesn’t eat enough?
Researchers identified seven key genes affected by maternal undernutrition, including NEDD4 and SLC30A1. These genes control cell development, nutrient transport, and muscle structure. Over 13,000 total methylation changes occurred, affecting genes involved in muscle development and metabolism.
Is this research about humans or animals?
This specific study was conducted in cattle (Wagyu breed), but the biological mechanisms are similar to humans. The findings support existing research showing maternal nutrition affects human offspring health, though direct human studies are still needed to confirm exact effects.
Can proper nutrition after birth reverse the effects of maternal undernutrition?
This study suggests no—calves received adequate nutrition after birth, yet the methylation changes from maternal undernutrition persisted at 300 days of age. This indicates that early nutritional damage may not be fully reversible through later nutrition alone.
Want to Apply This Research?
- Track daily calorie and protein intake during pregnancy using a nutrition app, aiming for 100-120% of recommended daily allowance. Log weekly weight gain to ensure it falls within healthy ranges (typically 25-35 pounds for normal-weight individuals).
- Set daily reminders to consume protein-rich foods at each meal (eggs, dairy, legumes, meat) and take prenatal vitamins consistently. Use the app to log meals and receive alerts if nutritional targets aren’t met.
- Monitor long-term by tracking offspring growth milestones (height, weight, developmental markers) and comparing to population averages. Note any metabolic or growth concerns that emerge in childhood and adolescence, as these may be influenced by prenatal nutrition.
This research was conducted in cattle and should not be directly applied to human pregnancy without additional human studies. While the findings suggest maternal nutrition during pregnancy may have lifelong effects on offspring through epigenetic mechanisms, individual human responses may vary. Pregnant individuals should consult with their healthcare provider about appropriate nutrition during pregnancy rather than making dietary changes based solely on this animal study. This article is for educational purposes and does not constitute medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.