Infertility affects roughly one in six people during their reproductive years. Age, genetics, hormonal disorders and underlying medical conditions remain the strongest determinants, but nutrition has become a serious area of research rather than a fringe one.
For years, studies chased individual nutrients: folic acid, vitamin D, antioxidants, omega-3. Modern nutritional science has moved towards whole dietary patterns instead, on the reasoning that foods interact and are almost never eaten in isolation.
Quick answer: Of all dietary patterns studied, the Mediterranean diet has the most consistent evidence linking it to higher pregnancy and live birth rates, particularly during IVF. Evidence on Mediterranean diet and fertility is observational, so overall dietary quality matters more than any branded plan.
Lifestyle matters for fertility. A BMC Public Health study found that women with 4–5 healthy habits had a 59% lower risk of infertility.
Fill out the questionnaire, and get a personalised, holistic and evidence-based programme tailored to you.
takes 3 minutes to completeConception depends on far more than healthy eggs and sperm. Ovulation, fertilisation, implantation, placental development and hormonal regulation are all shaped by metabolic health.
Diet affects several of the biological systems involved: inflammation, oxidative stress, insulin sensitivity, vascular function and hormone production. It also contributes to body weight, one of the strongest modifiable predictors of fertility.
Nutrition is not an alternative to fertility treatment. It is a low-risk lifestyle factor that may help optimise reproductive health before conception begins, which is a smaller claim than the supplement market tends to make.
The most comprehensive review to date was published in Nutrients in 2023. Researchers analysed eleven observational studies covering more than 33,000 women attempting either natural conception or pregnancy through assisted reproductive technology.
It compared several named dietary patterns: the Mediterranean diet, the Fertility Diet, the ProFertility Diet, the Dutch Dietary Guidelines and Western dietary patterns. Crucially, it measured clinical pregnancy, live birth and infertility rates rather than laboratory markers alone.
Despite considerable variation between studies, one finding held. Higher-quality dietary patterns were generally associated with better reproductive outcomes than unhealthy ones, and the Mediterranean diet showed the most consistent evidence (Nutrients, 2023).
Among all the patterns studied, Mediterranean diet and fertility is the pairing that produced the most promising results, and it did so repeatedly rather than in a single outlying study.
It is not a restrictive plan. It emphasises minimally processed foods: vegetables, fruit, legumes, whole grains, fish, nuts, seeds and extra virgin olive oil, while limiting processed meat, refined carbohydrates, sugary drinks and heavily processed foods.
This content is for educational purposes only. It has been reviewed for scientific accuracy, but it does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional regarding medical questions or fertility treatment decisions.
Reviewed for scientific accuracy by: Dr. Mona Bungum
Last reviewed: August 2026
Lifestyle matters for fertility. A BMC Public Health study found that women with 4–5 healthy habits had a 59% lower risk of infertility.
Fill out the questionnaire, and get a personalised, holistic and evidence-based programme tailored to you.
takes 3 minutes to completeSeveral studies in the review reported higher pregnancy and live birth rates among women with greater adherence during IVF treatment. When studies at higher risk of bias were excluded, the association grew stronger rather than weaker.
That last detail matters. Associations that survive the removal of weaker studies are more trustworthy than those that depend on them.
Researchers point to several plausible biological mechanisms rather than one single explanation.
Mediterranean diets are naturally rich in antioxidants including vitamins C and E, carotenoids, flavonoids and polyphenols. These help reduce oxidative stress, which can damage reproductive cells including developing oocytes, and the role of antioxidants is one of the better-studied areas.
The pattern is also high in anti-inflammatory foods such as vegetables, olive oil, legumes and oily fish. Chronic low-grade inflammation has been associated with poorer reproductive health, and reducing it may improve the environment for implantation.
Third, it improves insulin sensitivity and overall metabolic health. Balancing blood sugar matters particularly for women with polycystic ovary syndrome, where targeted nutrition for PCOS is already well established.
Finally, unsaturated fats from olive oil, nuts and fish support normal cell membrane function and hormone synthesis, both of which are essential to reproduction.
The review also examined the ProFertility Diet, the Fertility Diet and patterns based on national nutritional guidelines. Their specific recommendations differ, but all emphasise plant foods, whole grains, fish, legumes and healthy fats while limiting processed foods.
Several showed encouraging improvements in pregnancy rates during IVF. Because their compositions vary so much, researchers could not determine whether any one branded fertility diet outperforms the others.
The useful conclusion is that overall dietary quality appears to matter more than the label on the plan. That is a more practical finding than a winner would have been, because it means the pattern can be adapted to what you actually eat.
For couples in treatment this is often the question that matters most. Age remains the strongest predictor of IVF success, but dietary quality may play a supporting role.
The 2023 review found women with greater adherence to Mediterranean-style patterns generally experienced higher pregnancy and live birth rates during IVF than those with poorer diets. The trend held after excluding studies at higher risk of bias.
One detail is genuinely interesting. Healthier diets did not consistently improve laboratory measures such as eggs retrieved, fertilisation rates or embryo quality.
That suggests nutrition may act on later stages, implantation and early placental development, rather than on egg production. It also means a normal-looking lab report does not tell you diet made no difference.
Current evidence supports building an overall pattern rather than hunting individual "fertility foods". The foundation is vegetables, fruit, legumes, whole grains, oily fish, extra virgin olive oil, and nuts and seeds.
What to limit is equally unglamorous: sugar-sweetened drinks, refined grains, processed meats, frequent fast food, trans fats and excessive added sugar. No single food causes infertility, but diets high in ultra-processed foods are associated with poorer metabolic health.
We cover the food-by-food detail separately, so if that is what you need, start with our guide to fertility boosting foods. For applying it to your own circumstances, personalised nutrition plans and our wider guidance on nutrition and lifestyle go further than this article does.
Our webinar on smart nutrition for fertility covers the practical side in more depth again.
Condition-specific eating is its own subject. Endometriosis and diet has a distinct evidence base worth reading on its own terms.
Supplements are marketed heavily to couples trying to conceive, and the evidence for routine use is mixed at best. One exception is universal.
Women planning pregnancy should take 400 micrograms of folic acid daily, starting at least one month before conception and continuing through early pregnancy, to reduce the risk of neural tube defects.
The distinction between folate and folic acid is worth understanding, as is the case for taking folate before conception rather than after.
Antioxidants, coenzyme Q10, omega-3, vitamin D, selenium and herbal preparations have all shown inconsistent results in clinical studies. For most people, nutrients are better obtained from a varied diet unless a deficiency has been diagnosed.
If you are weighing up products, our overview of fertility supplements sets out what the evidence does and does not support.
The findings are encouraging, and they come with real caveats that deserve stating plainly.
Most fertility nutrition studies are observational. Participants reported their own eating habits through food-frequency questionnaires, which introduces recall bias. Dietary patterns also differ substantially between countries, making direct comparison difficult.
Researchers adjusted for age, smoking, body mass index and physical activity, but residual confounding cannot be excluded. Large randomised controlled trials are still needed before any single pattern can be recommended specifically to improve fertility.
None of this makes the evidence worthless. It makes it provisional, which is a different thing, and it is why the honest framing is "associated with" rather than "causes".
Common questions from people weighing up what to eat while trying to conceive.
A healthy dietary pattern may support fertility, but it cannot overcome every cause of infertility. Diet complements medical evaluation and treatment rather than replacing them. The evidence is strongest as preconception preparation, not as a treatment in itself.
The Mediterranean diet. Across the dietary patterns compared in the 2023 systematic review, it showed the most consistent association with improved pregnancy and live birth rates, and the association strengthened when weaker studies were excluded.
Several observational studies suggest healthier dietary patterns are associated with better IVF outcomes. Randomised trials are still needed. Age remains the strongest predictor, but improving diet before treatment is low-risk and benefits metabolic health regardless.
There is no established minimum, but three months is a sensible target. It aligns with the folate guidance, gives metabolic changes time to take effect, and matches the roughly 90-day window over which sperm are produced.
No branded plan has been shown to outperform the others. The Fertility Diet, ProFertility Diet and national guideline patterns all showed some benefit, but their compositions vary too much to rank them. Overall dietary quality matters more than the label.
Adherence appears to work on a gradient rather than as a threshold, so partial change is still worth making. Swapping butter for olive oil, adding legumes and eating fish weekly are meaningful steps without overhauling everything.
Folic acid is recommended before pregnancy. Other supplements, including coenzyme Q10, omega-3, vitamin D and antioxidants, have shown inconsistent results and should only be taken on professional advice or where a deficiency is diagnosed.
The evidence points more towards implantation and early placental development. Healthier diets did not consistently improve eggs retrieved, fertilisation rates or embryo quality in IVF studies, which is a notable and slightly counterintuitive finding.
Yes. Sperm production takes roughly 90 days and is affected by many of the same factors, including oxidative stress and metabolic health. Preconception dietary change is worth approaching as a shared project rather than one person's task.
The dietary pattern evidence does not address these directly, so this article cannot answer it. They are studied separately and warrant their own conversation with your clinician, particularly ahead of treatment.
Both conditions have their own nutritional evidence base, and in PCOS the insulin sensitivity mechanism is especially relevant. Condition-specific guidance is more useful than general advice, so start there rather than with a generic plan.
The fairest reading of the evidence is that nutrition belongs in preconception care rather than in the treatment column. It is preparation, not intervention, and framing it that way avoids both the overselling and the dismissal that this topic usually attracts.
Among the patterns studied so far, Mediterranean diet and fertility shows the most consistent association with improved pregnancy and live birth outcomes, particularly during IVF. That association is observational, and randomised trials are still needed.
What makes it a reasonable choice anyway is the risk profile. Improving dietary quality carries no meaningful downside, costs little, and closely matches the advice given for preventing cardiovascular disease and type 2 diabetes.
That overlap is not a coincidence. What benefits general health tends to benefit reproductive health, and a diet worth following for fertility is one worth keeping afterwards.
If you want a clearer starting point, baseline fertility testing or a conversation with one of the trusted clinics near you will tell you more than any eating plan alone.
