The Fertility Diet: What to Eat to Boost Your Chances of Conceiving

Nutrition is one of the most modifiable factors influencing fertility — and one of the most consistently underemphasized in mainstream fertility care. While reproductive medicine focuses heavily on pharmaceutical interventions, a growing body of peer-reviewed research demonstrates that dietary patterns significantly influence hormone balance, egg quality, sperm health, endometrial receptivity, and overall conception rates for couples across Europe and worldwide.

The Mediterranean Diet: The Gold Standard for Fertility Nutrition

Of all dietary patterns studied in relation to fertility outcomes, the Mediterranean diet has the most consistent and robust evidence base. A 2018 study in Human Reproduction followed 244 women undergoing IVF and found that women with the highest adherence to a Mediterranean diet had a 65–68% higher chance of clinical pregnancy and live birth compared to those with low adherence.

The Mediterranean diet is characterized by:

• High intake: Vegetables, fruits, legumes, whole grains, nuts, seeds, and olive oil
• Moderate intake: Fish and seafood (2–3 times per week), poultry, eggs, dairy
• Limited intake: Red meat, processed foods, refined carbohydrates, added sugar, trans fats
• Primary fat source: Extra virgin olive oil, rich in monounsaturated fats and antioxidant polyphenols

Key Nutrients for Female Fertility

Methylfolate: Essential for cell division and DNA synthesis. European guidelines recommend 400 mcg daily starting before conception. Choose methylfolate (5-MTHF) rather than synthetic folic acid — approximately 40–60% of people carry MTHFR variants that impair folic acid conversion.

Food sources: dark leafy greens, lentils, chickpeas, avocado.

Omega-3 Fatty Acids (DHA and EPA): Support egg maturation, regulate prostaglandin production, reduce inflammation relevant to endometriosis and PCOS, and are crucial for fetal brain development. Food sources: fatty fish (salmon, mackerel, sardines, herring), flaxseed, chia seeds, walnuts. Many European women benefit from supplementation with 500 mg+ DHA+EPA daily.

Iron: Pre-conception iron status significantly affects fertility and early pregnancy. Adequate iron supports ovulation — iron-deficient women have higher rates of anovulation. Enhance non-haem iron absorption by consuming plant sources with vitamin C.

Iodine: Essential for thyroid hormone production, which regulates ovulation and early pregnancy development. Many European women — particularly in landlocked regions with low-iodine soil — are borderline deficient. Ensure 150–200 mcg daily from food and supplements combined.

Vitamin D: European deficiency rates are high, particularly in northern latitudes and winter. Vitamin D supports follicle development, endometrial receptivity, and is associated with significantly higher IVF live birth rates in women with sufficient levels.

Key Nutrients for Male Fertility

Zinc: Essential for testosterone production and spermatogenesis. Low zinc — more common with plant-heavy diets — is associated with reduced sperm count, poor motility, and increased DNA fragmentation. Best food sources: oysters, beef, pumpkin seeds.

Selenium: Key antioxidant enzyme component in sperm. European soil selenium levels vary widely — northern and inland regions often have selenium-poor soil. Best food sources: Brazil nuts (1–2 daily), fish, eggs.

Lycopene: Carotenoid antioxidant that concentrates preferentially in testicular tissue, associated with improved sperm morphology and reduced DNA fragmentation. Cooked tomatoes provide more bioavailable lycopene than raw.

Coenzyme Q10: Mitochondrial nutrient essential for sperm motility, declining with age. Multiple RCTs support 100–300 mg/day for improving semen parameters in men with idiopathic infertility.

Foods to Limit When Trying to Conceive

Ultra-processed foods: High consumption is consistently associated with worse fertility outcomes. They displace nutrient-dense whole foods, drive inflammation, and often contain endocrine-disrupting additives.

Trans fats: Even modest intake (2% of energy) was associated with 73% higher risk of ovulatory infertility in the landmark Nurses' Health Study. Check labels on imported products — the EU has set limits but some processed imports may still contain them.

Alcohol: Both female and male fertility are negatively affected. Many fertility specialists recommend complete abstinence for both partners during active conception attempts.

High-mercury fish: Shark, swordfish, marlin, tilefish — avoid when planning pregnancy. Lower-mercury options (salmon, sardines, Atlantic mackerel, herring) are safe at 2–3 servings weekly.

Practical Meal Planning for Fertility

Breakfast: Greek yoghurt with mixed berries, ground flaxseed, and walnuts; scrambled eggs with spinach and cherry tomatoes

Lunch: Large salad with chickpeas, avocado, red pepper, and olive oil dressing; wholegrain bread

Dinner: Baked salmon with roasted broccoli, sweet potato, and olive oil; small portion of lentils or whole-grain pasta

Snacks: Handful of mixed nuts, apple with almond butter, hummus with vegetable sticks

When Diet Isn't Enough: Targeted Supplementation

Even an excellent diet has limitations. Nutrients like methylfolate, vitamin D, omega-3s, CoQ10, and iodine are challenging to obtain in sufficient quantities from food alone when planning pregnancy. Conceive Plus offers women's and men's fertility supplements formulated with these key evidence-supported nutrients, available across Europe at conceiveplus.eu.

The Conceive Plus fertility lubricant provides sperm-safe lubrication with pH, osmolality, and ion content matching fertile cervical mucus — an important consideration given that most available lubricants are significantly sperm-toxic.

Frequently Asked Questions: Fertility Diet

How quickly can dietary changes improve fertility?

Egg maturation takes ~90 days and sperm production ~72–74 days. Dietary changes need at least 3 months to fully influence available eggs and sperm. Start dietary optimisation as soon as possible — earlier is better.

Is organic food necessary for fertility?

The benefits of eating more fruits and vegetables — even conventional — significantly outweigh concerns about pesticide residue for most people. If budget allows, prioritising organic for the "dirty dozen" highest-pesticide produce is reasonable, but don't let cost prevent eating more vegetables.

Is caffeine harmful for fertility?

High caffeine intake (>300 mg/day — approximately 3 cups of regular coffee) has been associated with reduced fecundity and higher miscarriage risk. Most European fertility guidelines suggest limiting to 200 mg caffeine daily during pre-conception and pregnancy.

Should my partner also change his diet?

Absolutely. Male diet directly affects sperm quality — which affects fertilization success, embryo development, and pregnancy outcomes. Both partners should adopt the fertility-supportive eating pattern for best results.

Can diet help with PCOS-related infertility?

Yes. For women with PCOS, a lower glycaemic index diet improves insulin sensitivity, reduces androgen levels, and restores more regular ovulation. The Mediterranean diet pattern inherently provides a lower glycaemic load, making it particularly well-suited for women with PCOS.

Are fertility supplements necessary with a good diet?

A good diet substantially reduces the number of supplements needed, but some nutrients remain challenging to obtain in sufficient quantities from food alone — particularly methylfolate, vitamin D, omega-3 DHA/EPA, and CoQ10. Most fertility specialists recommend targeted supplementation even with an excellent diet.

How does body weight affect fertility?

Both underweight and overweight/obesity are associated with impaired ovulation and reduced conception rates. Even a modest 5–10% weight reduction for overweight women can significantly improve ovulatory function. A nutritious diet supporting a healthy weight is among the most impactful fertility interventions available.

Can diet improve sperm DNA fragmentation?

Yes. A diet rich in antioxidants (vitamins C, E, zinc, selenium, CoQ10, lycopene) directly reduces oxidative stress in seminal plasma — the primary driver of sperm DNA fragmentation. Improvements are detectable after the full spermatogenesis cycle (~3 months).

Conclusion: Nourish Your Fertility

A fertility-supportive diet isn't a restrictive regime — it's a shift toward whole, nutrient-dense foods that support your reproductive biology. The Mediterranean dietary pattern, supplemented with targeted nutrients like methylfolate, CoQ10, omega-3s, and vitamin D, creates the nutritional foundation for optimal fertility outcomes. Discover the full Conceive Plus range at conceiveplus.eu →