The Fertility Diet: Best Foods, Nutrients, and Eating Habits to Boost Your Chances of Conceiving

When you're trying to conceive, every choice you make feels significant — and the food you eat is no exception. Research over the past two decades has established a clear and compelling link between dietary patterns and reproductive health. A well-constructed fertility diet can meaningfully improve egg quality, support sperm health, regulate hormones, and reduce the oxidative stress that interferes with conception.

This guide brings together the most current evidence on nutrition and fertility, covering everything from specific foods and nutrients to meal planning strategies and the role of supplements. Whether you're in the early stages of trying to conceive or navigating a more complex fertility journey, understanding how food affects reproductive biology is one of the most empowering steps you can take.

Why Does Diet Matter for Fertility?

Fertility is not simply a matter of anatomy — it is deeply influenced by physiology, and physiology is shaped by what you eat. The foods you consume affect hormone production, egg and sperm development, inflammation levels, and the metabolic conditions that either support or hinder conception.

A landmark study published in the American Journal of Obstetrics and Gynecology found that women who followed a "pro-fertility" dietary pattern had significantly higher odds of successful conception compared to those eating a typical Western diet. Similarly, research from the Harvard T.H. Chan School of Public Health demonstrated that dietary patterns rich in plant proteins, whole grains, high-fat dairy, and micronutrients were associated with a lower risk of ovulatory infertility.

For men, nutrition is equally critical. Sperm quality — including count, motility, and morphology — is directly influenced by nutritional intake. Oxidative stress, which can be exacerbated by a poor diet, is a known contributor to male factor infertility, implicated in up to 40–50% of cases according to some research.

The good news: dietary changes can produce measurable improvements in reproductive markers within three to four months, the approximate timeframe of a complete sperm cycle and much of the egg maturation process. Starting your fertility diet now can genuinely make a difference.

Top Fertility-Boosting Foods to Add to Your Plate

A fertility diet is not about deprivation — it's about abundance. The following foods are backed by clinical research and should form the foundation of your eating plan:

Leafy Greens and Cruciferous Vegetables

Spinach, kale, broccoli, Brussels sprouts, and Swiss chard are rich in folate, iron, vitamin C, and antioxidants. Folate is critical for DNA synthesis and cell division — processes essential to both egg quality and healthy early foetal development. Women trying to conceive should aim for at least 400–600 mcg of folate daily, and dark leafy greens are among the most bioavailable dietary sources.

Fatty Fish

Salmon, sardines, mackerel, and trout are excellent sources of omega-3 fatty acids (EPA and DHA). Omega-3s support hormonal balance, reduce systemic inflammation, improve uterine blood flow, and are essential for foetal brain and retinal development in early pregnancy. A study published in Human Reproduction found that women with higher omega-3 intake had improved embryo quality during IVF cycles.

Whole Grains

Brown rice, oats, quinoa, and wholegrain bread provide sustained energy without the blood sugar spikes associated with refined carbohydrates. High glycaemic diets elevate insulin levels, which can disrupt ovarian function and worsen conditions such as polycystic ovary syndrome (PCOS). Harvard research found that replacing refined carbs with whole grains was associated with a 36% lower risk of ovulatory infertility.

Legumes and Plant Proteins

Lentils, chickpeas, black beans, and edamame are rich in vegetable protein, folate, iron, and zinc. The Harvard Nurses' Health Study found that replacing one daily serving of animal protein with plant protein was associated with significantly lower rates of infertility related to ovulation disorders.

Full-Fat Dairy

Counterintuitively, full-fat dairy products such as whole milk, full-fat yoghurt, and cheese have been associated with improved fertility outcomes in some research. The Harvard Nurses' Health Study found that women who consumed at least one serving of full-fat dairy daily had a 25% lower risk of ovulatory infertility compared to those consuming low-fat dairy exclusively. The fat-soluble hormones in full-fat dairy may play a role in ovarian function.

Nuts and Seeds

Walnuts, almonds, flaxseeds, and pumpkin seeds deliver vitamin E, omega-3s, zinc, and selenium — all critical for reproductive health. Walnuts in particular have been shown in clinical trials to improve sperm vitality and motility when consumed regularly by men.

Berries and Colourful Fruits

Blueberries, raspberries, strawberries, and pomegranate are packed with antioxidants including vitamin C, resveratrol, and anthocyanins that protect eggs and sperm from oxidative damage. Avocado provides monounsaturated fats and folate, and has been linked to better outcomes in assisted reproduction studies.

Foods and Habits to Avoid

Just as some foods support fertility, others actively work against it. Reducing or eliminating the following can make a meaningful difference:

Trans Fats

Artificial trans fats, found in some processed snacks, fried foods, and commercially baked goods, are among the most harmful dietary components for reproductive health. Research from the Harvard Nurses' Health Study found that even a small increase in trans fat intake (just 2% of calories) was associated with a 73% increased risk of ovulatory infertility.

Refined Carbohydrates and Added Sugar

White bread, pastries, sugary drinks, and ultra-processed foods spike blood glucose and insulin, disrupting the hormonal environment needed for ovulation. High sugar intake is also associated with increased inflammation, which can impair implantation.

Alcohol

Even moderate alcohol consumption has been linked to reduced fertility in both men and women. For women, alcohol can disrupt hormonal balance and menstrual cycle regularity. For men, it reduces testosterone levels, impairs sperm quality, and interferes with zinc absorption — a critical fertility nutrient. Most fertility specialists recommend abstaining from alcohol when actively trying to conceive.

Highly Processed Meats

Bacon, sausages, and deli meats contain high levels of saturated fat, preservatives, and in some cases nitrates that have been associated with poorer sperm quality in observational studies. Choosing lean, unprocessed meats or plant proteins is preferable.

High-Mercury Fish

Tilefish, shark, swordfish, and king mackerel contain high levels of mercury, a neurotoxin that can impair fertility and harm foetal development. Stick to low-mercury options such as salmon, sardines, trout, and shrimp.

Excessive Caffeine

Research on caffeine and fertility is mixed, but most evidence suggests limiting consumption to 200 mg per day (roughly one to two cups of coffee) when trying to conceive. Higher intakes have been linked to increased time to pregnancy and slightly higher miscarriage risk in some studies.

The Mediterranean Diet and Fertility: What the Research Shows

Of all the dietary patterns studied in relation to fertility, the Mediterranean diet has the most robust evidence base. Characterised by high consumption of vegetables, fruits, whole grains, legumes, nuts, olive oil, and fish — with moderate dairy and limited red meat — the Mediterranean diet aligns almost perfectly with the nutritional requirements for reproductive health.

A 2018 study published in Human Reproduction found that women undergoing IVF who adhered closely to a Mediterranean diet had a 65–68% higher chance of achieving clinical pregnancy and live birth compared to those with low adherence. The effects were most pronounced in women over 35, suggesting the diet may partly counteract age-related fertility decline.

For men, a Mediterranean-style diet has been associated with higher sperm counts, better motility, and improved morphology. A Spanish study found that men who closely followed Mediterranean dietary patterns had significantly better sperm parameters than those with lower adherence.

Practical Mediterranean eating means: building meals around vegetables and legumes, using olive oil as your primary fat, eating fish two to three times per week, choosing whole grains over refined options, enjoying a handful of nuts daily, and limiting red meat to occasional consumption. It is an eating pattern that is both sustainable and supremely fertility-supportive.

Key Nutrients for Fertility: A Deep Dive

While overall dietary patterns matter enormously, specific nutrients have been identified as particularly critical for reproductive health. Understanding these can help you make targeted food choices — and identify where supplementation may be warranted.

Folate (Vitamin B9)

Perhaps the most well-known fertility and pregnancy nutrient, folate is essential for DNA synthesis, cell division, and neural tube development in early pregnancy. Its role begins even before conception, as adequate folate status in the weeks prior to and following fertilisation dramatically reduces the risk of neural tube defects. The active form, methylfolate (5-MTHF), is better utilised by women who carry the MTHFR genetic variant — a common polymorphism affecting folate metabolism in an estimated 30–40% of the population. Food sources include dark leafy greens, legumes, asparagus, and fortified foods.

Omega-3 Fatty Acids (EPA and DHA)

Omega-3s reduce systemic inflammation, support oestrogen balance, improve blood flow to the uterus and ovaries, and are critical for foetal brain and eye development. Most people — particularly those who do not eat oily fish regularly — do not consume adequate omega-3s. Food sources include salmon, sardines, mackerel, flaxseeds, chia seeds, and walnuts. Algae-based DHA supplements are an excellent option for those who do not consume fish.

Antioxidants: Vitamins C, E, and CoQ10

Oxidative stress — an imbalance between free radicals and antioxidants — is a major driver of egg and sperm damage. Vitamin C (found in citrus fruits, kiwi, bell peppers, and strawberries) and Vitamin E (found in nuts, seeds, and avocado) are powerful antioxidants that protect reproductive cells. Coenzyme Q10 (CoQ10), found in meat, fish, and nuts, plays a particularly important role in mitochondrial energy production within egg cells, and some research suggests supplementation may improve egg quality, especially in older women.

Zinc

Zinc is critical for cell division, DNA synthesis, and hormonal function in both sexes. In women, adequate zinc supports the ovulation process and corpus luteum function (important for early pregnancy support). In men, zinc is highly concentrated in semen and is directly involved in sperm production, motility, and testosterone metabolism. Oysters are the richest dietary source; other sources include red meat, poultry, pumpkin seeds, legumes, and whole grains.

Iron

Iron deficiency is associated with anovulatory infertility (failure to ovulate) in women. The Harvard Nurses' Health Study found that women with the highest iron intake from non-haem (plant-based) sources had a 40% lower risk of ovulatory infertility. Haem iron from meat is well absorbed, but non-haem iron from lentils, beans, fortified cereals, and spinach — particularly when combined with vitamin C — is also effective.

Vitamin D

Vitamin D receptors are found throughout the reproductive system, including on ovarian granulosa cells and in testicular tissue. Deficiency is linked to irregular menstrual cycles, reduced IVF success rates, and lower sperm quality. Dietary sources include fatty fish and egg yolks, but sun exposure remains the primary source for most people — and supplementation is often necessary in regions with limited sunlight.

Iodine

Iodine is essential for thyroid hormone production, and thyroid function profoundly affects fertility and early pregnancy outcomes. The thyroid regulates basal metabolic rate, ovarian function, and implantation. Women planning pregnancy should ensure adequate iodine intake through seafood, dairy, eggs, and iodised salt.

Fertility Diet for Men vs Women: Key Differences

A fertility diet benefits both partners, but there are some sex-specific nutritional priorities worth understanding.

For Women

Women's fertility nutrition focuses heavily on hormonal regulation, egg quality, and creating an optimal uterine environment. Key priorities include:

• Folate: Begin supplementing with methylfolate at least three months before trying to conceive
• Iron: Prioritise plant-based iron sources to support ovulation
• Iodine: Critical for thyroid function and implantation
• Healthy fats: Support oestrogen production and uterine blood flow
• Complex carbohydrates: Stabilise insulin and support ovarian function, particularly important for women with PCOS

Women with PCOS in particular benefit from a lower glycaemic diet. Research consistently shows that reducing sugar and refined carbohydrate intake can restore ovulation in women with PCOS, with some studies showing improvements comparable to medication in mild cases.

For Men

Male fertility nutrition centres on sperm production, quality, and motility. Key priorities include:

• Zinc and selenium: Essential for sperm production and testosterone levels
• Antioxidants: Protect sperm DNA from oxidative damage
• Omega-3s: Improve sperm motility and membrane integrity
• Lycopene: Found in tomatoes, watermelon, and pink grapefruit; associated with improved sperm morphology
• Avoid alcohol and processed foods: Both are directly toxic to sperm production

A study published in Fertility and Sterility found that men who consumed the highest amounts of fruit, vegetables, whole grains, and fish had significantly better sperm parameters than those who followed a typical Western dietary pattern high in red meat, processed foods, and sugar-sweetened beverages.

Ideally, both partners should begin optimising their diet at least three months before actively trying to conceive. This timeframe allows a complete spermatogenesis cycle and encompasses much of the egg maturation process.

Practical Fertility Meal Planning Tips

Knowing what to eat is one thing — making it happen consistently is another. These practical strategies can help you build sustainable fertility-supportive eating habits:

Meal Prep on Weekends

Batch cook grains, roast a large tray of vegetables, and prepare a pot of legume-based soup or stew on Sundays. Having nutrient-dense building blocks in the fridge makes it dramatically easier to assemble quick, fertility-supportive meals during the week.

Build a Fertility-Friendly Pantry

Stock your kitchen with tinned sardines or salmon, a variety of dried and tinned legumes, whole grain pasta and rice, olive oil, a range of nuts and seeds, tinned tomatoes, and quality dark chocolate (70%+ cocoa, rich in flavonoids and antioxidants). These shelf-stable staples make healthy eating accessible even on busy days.

Follow the Plate Method

Aim for half your plate to be vegetables and legumes, a quarter whole grains, and a quarter high-quality protein (preferably fish, eggs, or plant proteins). Add a healthy fat source at every meal — olive oil dressing, avocado, or a handful of nuts.

Eat the Rainbow

Different coloured fruits and vegetables provide different antioxidant compounds. Aim to include a diverse range of colours across your weekly diet: dark greens, red tomatoes and berries, orange and yellow peppers and sweet potatoes, purple aubergine and blueberries.

Mindful Portion Awareness

Both underweight and overweight status can impair fertility. Extremes of body weight disrupt hormone production and ovulation. A balanced diet with appropriate caloric intake — not restriction — is the goal. If you suspect weight is a factor in your fertility journey, a registered dietitian can provide personalised guidance.

Stay Hydrated

Adequate hydration supports cervical mucus production, endometrial thickness, and general physiological function. Aim for 1.5–2 litres of water daily. Herbal teas (raspberry leaf, ginger, nettle) can contribute to fluid intake and some have traditionally been associated with reproductive health.

When Can Supplements Help?

A food-first approach is always ideal — whole foods deliver nutrients in a matrix that enhances absorption and comes packaged with complementary compounds. However, it is almost impossible to consistently achieve optimal levels of every fertility-critical nutrient through diet alone, particularly for folate, vitamin D, omega-3s, and iodine.

Supplements can play a valuable supportive role in the following circumstances:

• Pre-conception preparation: A prenatal supplement containing methylfolate (rather than synthetic folic acid) should be started at least three months before trying to conceive
• Dietary gaps: Those following plant-based diets may need additional vitamin B12, iron, zinc, omega-3 DHA, and iodine
• MTHFR gene variant: Women with confirmed MTHFR variants should choose methylfolate over folic acid for better utilisation
• Vitamin D deficiency: Common in many populations, particularly during winter months; testing and targeted supplementation is recommended
• Male fertility support: Zinc, CoQ10, vitamin C, vitamin E, and selenium have all shown benefit in clinical trials for improving sperm parameters
• Age-related fertility decline: CoQ10 is of particular interest for women over 35, as mitochondrial energy production in egg cells declines with age

When selecting a prenatal supplement, quality matters enormously. Look for supplements that use active, bioavailable forms of nutrients — methylfolate rather than folic acid, methylcobalamin rather than cyanocobalamin, and DHA from algae or fish oil rather than synthetic sources. Third-party testing certification adds an additional layer of quality assurance.

It is worth noting that supplements should complement a good diet, not replace it. No supplement can fully replicate the benefits of consistent, high-quality nutrition — but the right supplement can meaningfully fill the gaps that diet alone cannot close.

Frequently Asked Questions

How quickly can a fertility diet improve my chances of conceiving?

Dietary changes can begin improving fertility markers within weeks for some measures (such as hormonal balance and inflammation), but the most significant benefits accrue over three to four months — the timeframe of a complete sperm production cycle and much of the egg maturation process. Starting your fertility diet as early as possible gives you the best foundation.

Is the Mediterranean diet the best eating plan for fertility?

The Mediterranean diet has the strongest evidence base for fertility benefits, with multiple large studies linking it to improved IVF outcomes, better sperm quality, and higher natural conception rates. It is a sustainable, balanced, and nutrient-dense eating pattern that aligns closely with what research identifies as optimal for reproductive health.

Can diet alone cure infertility?

Diet is a powerful modifier of fertility but is not a cure for all causes of infertility. Structural issues, genetic factors, severe hormonal imbalances, or medical conditions such as severe endometriosis or azoospermia require medical evaluation and treatment. Diet optimises the biological environment for conception and can improve outcomes alongside medical care, but it is not a standalone solution for all fertility challenges.

What is the most important nutrient for female fertility?

Folate (particularly in its active methylfolate form) is generally considered the most critical single nutrient for women planning pregnancy, due to its role in DNA synthesis, cell division, and neural tube protection. However, vitamin D, omega-3s, iron, and iodine are also highly important, and optimal fertility nutrition involves adequate levels of all key micronutrients.

What should men eat to improve sperm quality?

Men should focus on zinc-rich foods (oysters, pumpkin seeds, red meat), antioxidant-rich fruits and vegetables, omega-3 sources (fatty fish, walnuts), and lycopene-containing foods (tomatoes, watermelon). Avoiding alcohol, reducing processed meat and refined sugar, and maintaining a healthy weight are equally important. Walnuts specifically have been shown in clinical trials to improve sperm vitality and motility.

Is caffeine really bad for fertility?

Moderate caffeine consumption (under 200 mg per day, or approximately one to two cups of coffee) is generally considered acceptable when trying to conceive. Higher intakes have been associated with increased time to pregnancy and slightly elevated miscarriage risk in some research. If you are sensitive to caffeine or under medical advice to reduce intake, gradually cutting back is a sensible precaution.

Can a plant-based diet support fertility?

Yes — a well-planned plant-based diet can be highly fertility-supportive, particularly given its emphasis on vegetables, legumes, whole grains, and nuts. However, those following vegan diets should be particularly attentive to vitamin B12, zinc, omega-3 DHA (available from algae-based supplements), iron, iodine, and vitamin D — all nutrients that are either absent from or less bioavailable in plant-based diets.

Does body weight affect fertility?

Yes, significantly. Both underweight and overweight status can disrupt hormone production and ovulation. Excess body fat raises oestrogen levels and is linked to irregular cycles and ovulatory dysfunction. Very low body fat impairs the hormonal signalling required for ovulation. Achieving and maintaining a healthy weight through balanced nutrition and regular physical activity supports optimal hormonal function for conception.

Are there foods that can help with PCOS-related infertility?

Women with PCOS benefit strongly from a low-glycaemic fertility diet. Reducing refined carbohydrates and added sugar, prioritising whole grains, increasing protein intake, and adding anti-inflammatory foods (fatty fish, leafy greens, berries, nuts) can improve insulin sensitivity and restore ovulation in many cases. Inositol — found naturally in citrus fruit, beans, and wholegrains — has also shown significant promise in managing PCOS-related hormonal imbalances.

Should I take a prenatal supplement even before I'm pregnant?

Absolutely. Many healthcare guidelines recommend beginning a prenatal supplement containing folate at least three months before trying to conceive. This timing ensures adequate folate levels during the critical neural tube development window (which occurs in the first few weeks of pregnancy, often before a woman knows she is pregnant). Starting early also allows time for other nutrient levels — such as vitamin D, iron, and omega-3s — to optimise.