According to Gram Research analysis, women who eat more plant-based foods have significantly better fertility outcomes. A 2026 cross-sectional study of 3,105 American women found that those with the highest plant-based diet scores had a 25% lower chance of infertility compared to those with the lowest scores. Each 14-point increase on the plant-based diet index was associated with a 12% reduction in infertility odds, suggesting that eating more plants and fewer animal products may support reproductive health.
A new study of over 3,000 American women found that those who ate more plant-based foods had better chances of getting pregnant. Researchers looked at data from 2013 to 2018 and compared women’s diets to their fertility. Women who scored highest on a plant-based diet index were 25% less likely to report infertility problems than those who ate the least plant-based foods. The study suggests that what you eat might play an important role in fertility, though researchers can’t yet prove that diet alone causes the difference.
Key Statistics
A 2026 cross-sectional study of 3,105 U.S. women found that those with the highest plant-based diet scores had a 25% lower likelihood of infertility compared to women with the lowest scores.
According to research reviewed by Gram, each one-standard deviation increase in plant-based diet adherence (approximately 14 points) was associated with a 12% reduction in the odds of infertility among women aged 20-45.
In a nationally representative sample of 3,105 American women, approximately 13% reported infertility, with higher plant-based diet adherence showing a consistent trend toward lower infertility risk across dietary tertiles.
The Quick Take
- What they studied: Whether eating a diet with more plants and fewer animal products is connected to better fertility in women
- Who participated: 3,105 American women between ages 20 and 45 who answered questions about their diet and whether they’d had trouble getting pregnant
- Key finding: Women who ate the most plant-based foods had a 25% lower chance of infertility compared to women who ate the least plant-based foods
- What it means for you: If you’re trying to get pregnant, eating more plants might help, but this study shows a connection, not proof that diet causes fertility. Talk to your doctor about your diet and fertility concerns.
The Research Details
Researchers used information from a large national health survey called NHANES that tracks what Americans eat and their health. They looked at data collected between 2013 and 2018 from women of childbearing age. Each woman reported what she ate over two separate days, and researchers scored how plant-based her diet was using a special scale that goes from 0 to 150 points. Higher scores meant eating more plants and fewer animal products.
The researchers also asked women if they’d been trying to get pregnant for a year or longer without success. They then compared the diet scores of women who reported infertility to those who didn’t, while accounting for other factors that might affect fertility like age, weight, smoking, exercise, and income.
This type of study is called cross-sectional, which means researchers looked at everything at one point in time rather than following women over months or years. This helps identify connections between diet and fertility but can’t prove that diet causes fertility problems.
Understanding what we eat and how it affects our ability to have children is important because diet is something people can actually change. If plant-based eating really does help with fertility, it’s a simple, affordable change many people could make. This study used real data from a nationally representative group of American women, making the findings more relevant to the general population than studies done in labs or with small groups.
This study has several strengths: it included over 3,000 women from across the United States, researchers adjusted their analysis for many factors that could affect fertility, and the results stayed consistent even when they tested them different ways. However, the study only looked at one moment in time, so we can’t know if the diet caused better fertility or if women with better fertility happened to eat healthier. Also, women reported their own infertility rather than being medically tested, which could be less accurate.
What the Results Show
Among the 3,105 women studied, about 13% reported having infertility. Women were divided into three groups based on how plant-based their diet was. Those in the highest plant-based diet group had a 25% lower chance of infertility compared to those in the lowest group. When researchers looked at diet as a continuous scale, each increase of about 14 points on the plant-based diet score (which is one standard deviation) was linked to a 12% lower chance of infertility.
These connections remained strong even after researchers accounted for age, race, income, marital status, smoking, alcohol use, weight, secondhand smoke exposure, high blood pressure, and exercise. The trend of lower infertility with higher plant-based eating was consistent across the groups tested.
The researchers also tested whether the findings held up differently for younger versus older women and for women with different weights. The results stayed similar across these different groups, suggesting the connection between plant-based eating and fertility is fairly consistent.
The study found that the connection between plant-based diet and lower infertility risk was consistent across different age groups and body weights. This suggests the benefit isn’t limited to just one type of woman but may apply broadly. The fact that results remained stable even when researchers used different statistical methods and adjusted for many other factors suggests the finding is fairly robust.
This is the first study to look specifically at the EAT-Lancet planetary health diet and female infertility. Previous research has shown that overall diet quality matters for fertility, and some studies have found that plant-based diets help with other health problems like heart disease and diabetes. This study adds to growing evidence that what we eat affects our reproductive health, though more research is needed to understand exactly how.
The biggest limitation is that this study shows a connection but can’t prove that eating more plants causes better fertility. Women reported their own infertility rather than being tested by doctors, which might not be completely accurate. The study only looked at diet at one point in time, so we don’t know if women changed their eating habits over time. Also, the study couldn’t measure all factors that affect fertility, like stress, sleep, or specific medical conditions. Finally, the study included mostly women who participated in a health survey, so results might not apply to all American women.
The Bottom Line
If you’re trying to get pregnant, increasing plant-based foods in your diet appears to be a safe, healthy change worth considering. This could mean eating more vegetables, fruits, whole grains, beans, and nuts while eating less meat and dairy. However, this study shows a connection, not proof of cause and effect. Work with your doctor or a fertility specialist to develop a complete fertility plan that includes diet, exercise, stress management, and medical care if needed. (Moderate confidence based on observational evidence)
Women of childbearing age who are trying to get pregnant or planning to conceive should find this information helpful. Women with known fertility issues should discuss dietary changes with their doctor before making major changes. This research is less relevant to women who aren’t trying to get pregnant, though eating a plant-based diet has other health benefits. Men trying to conceive should also consider diet, though this study only looked at women.
Diet changes typically take several months to show effects on overall health. If you’re trying to get pregnant, give dietary changes at least 3-6 months while also following your doctor’s fertility recommendations. Some fertility benefits from improved diet quality might appear sooner, but patience is important.
Frequently Asked Questions
Does eating a plant-based diet help with fertility?
Research shows a connection between plant-based eating and better fertility outcomes. A 2026 study of 3,105 women found those eating the most plant-based foods had 25% lower infertility rates. However, this shows correlation, not proof of cause. Talk to your doctor about dietary changes for fertility.
How much plant-based food do I need to eat to improve fertility?
The study measured diet on a 0-150 point scale, with higher scores indicating more plant-based foods. Each 14-point increase was linked to 12% lower infertility odds. Focus on gradually adding vegetables, fruits, whole grains, and legumes while reducing animal products.
Can diet alone fix infertility problems?
Diet appears to be one factor affecting fertility, but it’s not a complete solution. This study shows a connection between plant-based eating and lower infertility rates, but many other factors matter too. Work with a fertility specialist for comprehensive evaluation and treatment.
What specific plant-based foods help with fertility?
The study measured overall plant-based diet quality rather than specific foods. Focus on whole foods like vegetables, fruits, legumes, whole grains, nuts, and seeds. These provide nutrients important for reproductive health and overall wellness.
How long does it take to see fertility improvements from diet changes?
This study doesn’t specify a timeline since it looked at one point in time. Generally, diet changes take 3-6 months to show health effects. If trying to conceive, combine dietary improvements with medical care and give changes several months to work.
Want to Apply This Research?
- Track your daily plant-based food servings (vegetables, fruits, whole grains, legumes, nuts) and your overall plant-based diet score. Aim to increase servings by one per day each week until you reach 8-10 servings daily.
- Start by adding one plant-based meal per week, then gradually increase to two or three. Use the app to log meals and see your plant-based diet score increase. Set a goal to reach a higher score on the plant-based diet index each month.
- Log meals for 2-3 days per week to track your plant-based diet score. Review your score monthly and note any changes in how you feel. If trying to conceive, track this alongside your fertility tracking to see if dietary improvements correlate with cycle regularity or other fertility markers.
This research shows a connection between plant-based diet and fertility but cannot prove cause and effect. The study relied on self-reported infertility rather than medical diagnosis. These findings should not replace professional medical advice. If you’re experiencing infertility or planning to conceive, consult with a healthcare provider, fertility specialist, or registered dietitian before making significant dietary changes. This information is for educational purposes only and is not a substitute for personalized medical care.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.