Fertility Diet: The Best Foods to Eat When Trying to Conceive

What you eat before and during conception has a profound impact on your fertility, the quality of your eggs and sperm, and the health of your early pregnancy. Fertility nutrition is one of the most powerful — and most accessible — tools couples have when trying to conceive. This comprehensive guide covers the science behind a fertility-supportive diet, the specific foods that boost reproductive health, nutrients to prioritise, and what to avoid to give yourself the best possible foundation for conception.

The Science Behind Fertility Nutrition: Why Food Matters for Conception

Every cell in your reproductive system depends on the nutrients your body receives from food. Egg cells take months to mature, during which time their quality is influenced by circulating nutrients, antioxidants, and hormones — all of which diet helps determine. Similarly, sperm take approximately 74 days to develop, during which dietary factors shape their count, motility, morphology, and DNA integrity.

Beyond sperm and egg quality, diet affects fertility through several mechanisms:

• Hormonal balance: Insulin, oestrogen, progesterone, and testosterone levels all respond to dietary patterns. High-sugar diets increase insulin and can disrupt ovulation; excess processed fats alter hormone metabolism.
• Inflammation: Chronic low-grade inflammation is increasingly linked to infertility in both sexes. Anti-inflammatory diets — rich in omega-3s, antioxidants, and fibre — can reduce this inflammation.
• Oxidative stress: Free radicals damage egg and sperm DNA. Antioxidants from food neutralise these radicals, protecting reproductive cells.
• Gut health: The gut microbiome influences oestrogen metabolism and systemic inflammation; a fibre-rich diet supporting gut health also supports hormonal balance.
• Body composition: Both under and overweight can impair fertility. A nutrient-dense diet supports healthy weight management that optimises reproductive hormones.

The Mediterranean Diet: The Gold Standard for Fertility

Among all dietary patterns studied for fertility, the Mediterranean diet has the strongest and most consistent evidence base. Multiple large studies show that adherence to a Mediterranean-style diet is associated with:

• Higher IVF success rates
• Better embryo quality
• Reduced time to conception
• Lower risk of gestational diabetes
• Better sperm parameters in men

The core components of the Mediterranean diet include:

• Abundant vegetables and fruits (aim for 7-10 servings daily)
• Whole grains (brown rice, quinoa, oats, whole wheat)
• Legumes (beans, lentils, chickpeas — excellent plant-based protein and folate)
• Nuts and seeds (especially walnuts, almonds, and flaxseed)
• Olive oil as the primary fat
• Fish and seafood 2-3 times per week
• Moderate amounts of poultry, eggs, and dairy
• Limited red meat
• Minimal processed foods, refined sugars, and trans fats

Key Nutrients for Female Fertility

While overall diet quality matters most, certain nutrients play especially critical roles in female reproductive health:

Folate (Vitamin B9)

Folate is perhaps the most important preconception nutrient for women. It's essential for DNA synthesis and cell division — processes that are critical in the earliest stages of embryo development. Adequate folate before conception and in the first weeks of pregnancy dramatically reduces the risk of neural tube defects (spina bifida). Food sources include: dark leafy greens (spinach, kale, bok choy), asparagus, broccoli, lentils, chickpeas, and edamame. Most fertility specialists recommend 400-800mcg of supplemental folate daily, in addition to dietary sources.

Iron

Non-haem iron (from plant sources) appears particularly beneficial for fertility. The famous Nurses' Health Study II found that women who ate more plant-based iron had significantly lower rates of ovulatory infertility than those who relied on animal-based iron. Good plant-based iron sources include: lentils, tofu, edamame, spinach, pumpkin seeds, and fortified cereals. Always pair plant-based iron with vitamin C to enhance absorption.

Omega-3 Fatty Acids

Omega-3 fatty acids — particularly DHA and EPA — are critical for hormone production, reducing inflammation, and supporting uterine blood flow. DHA is also critical for developing brain tissue in early pregnancy. Best food sources: oily fish (salmon, mackerel, sardines, anchovies), walnuts, flaxseed, chia seeds, and algae-based omega-3 supplements (for those avoiding fish).

Zinc

Zinc is critical for ovulation and corpus luteum function (the structure that produces progesterone after ovulation). Deficiency impairs ovulation and egg quality. Best sources: oysters (the richest food source), beef, pumpkin seeds, cashews, chickpeas, and fortified cereals.

Antioxidants: Vitamins C and E, CoQ10, and More

Antioxidants protect eggs and sperm from free radical damage. Key antioxidants and their food sources:

• Vitamin C: Bell peppers, strawberries, kiwi, citrus fruits, broccoli
• Vitamin E: Almonds, sunflower seeds, avocado, olive oil, spinach
• CoQ10: While foods provide some (beef, sardines, mackerel), supplemental CoQ10 is often recommended for meaningful therapeutic levels
• Beta-carotene (provitamin A): Sweet potato, carrots, butternut squash, mango — converts to vitamin A in the body
• Lycopene: Cooked tomatoes, watermelon, pink grapefruit — particularly beneficial for male fertility
• Selenium: Brazil nuts (just 2 per day provides adequate selenium), tuna, eggs, sunflower seeds

Vitamin D

Low vitamin D is associated with reduced fertility in both sexes. In women, it affects egg quality, uterine receptivity, and implantation. Food sources are limited (fatty fish, fortified foods), and many people need supplementation to reach optimal levels. Conceive Plus fertility supplements include vitamin D3 to help address this widespread deficiency.

B Vitamins

Beyond folate, other B vitamins support fertility:

• B6 (pyridoxine): Supports progesterone production and reduces PMS symptoms; found in poultry, fish, potatoes, bananas
• B12 (cobalamin): Essential for cell division; primary sources are animal products, making supplementation important for vegans and vegetarians
• Riboflavin (B2): Supports mitochondrial function in eggs; found in dairy, eggs, meat, fortified cereals

Key Nutrients for Male Fertility

Men's fertility nutrition is just as important as women's, yet often overlooked. The same antioxidant-rich, Mediterranean-style diet that benefits women also improves sperm health significantly:

Zinc and Selenium

Both are critical for sperm production and function. Zinc is needed for testosterone synthesis and sperm development; selenium is a structural component of the sperm flagellum. Deficiencies in either directly impair sperm quality. Both are found in oysters, Brazil nuts, beef, eggs, and pumpkin seeds.

Lycopene

Lycopene is concentrated in testicular tissue and protects sperm from oxidative damage. Multiple studies show lycopene supplementation improves sperm count, motility, and morphology. Cooked tomatoes are the richest source — cooking in olive oil dramatically increases lycopene bioavailability. Red watermelon, pink grapefruit, and rosehip are other sources.

L-Carnitine and L-Arginine

These amino acids fuel sperm motility. L-carnitine is particularly concentrated in epididymal fluid and is essential for sperm energy metabolism. Food sources include red meat and dairy, but supplementation is often needed for therapeutic levels.

Omega-3 Fatty Acids

DHA is a major component of the sperm cell membrane head — adequate DHA is essential for normal sperm morphology and motility. Studies show omega-3 supplementation improves sperm parameters significantly.

Superfoods for Fertility: What to Put on Your Plate

While no single food is a fertility miracle, some are nutritionally exceptional for reproductive health:

Avocado

Rich in monounsaturated fats, folate, vitamin E, and potassium, avocado is a fertility superfood. Studies from Harvard found that higher monounsaturated fat intake was significantly associated with better IVF outcomes in women. Half an avocado per day is a simple, delicious addition to a fertility diet.

Walnuts

Research published in Biology of Reproduction showed that men who ate 75g (about a handful) of walnuts daily for 12 weeks significantly improved their sperm motility, vitality, and morphology. Walnuts are rich in omega-3s, antioxidants, and polyunsaturated fats — all beneficial for reproductive health in both sexes.

Leafy Greens (Spinach, Kale, Bok Choy)

Dark leafy greens are nutritional powerhouses for fertility: high in folate, iron, calcium, magnesium, and antioxidants. Aim for at least 2-3 servings daily. Lightly cooked spinach and kale provide better iron and calcium absorption than raw.

Oily Fish (Salmon, Mackerel, Sardines)

Rich in omega-3s, vitamin D, zinc, and selenium — a comprehensive fertility nutrient package. Aim for 2-3 servings per week. Choose lower-mercury species: wild salmon, sardines, anchovies, mackerel, and herring are preferable to high-mercury options like swordfish and shark.

Berries (Blueberries, Strawberries, Raspberries)

Among the richest sources of antioxidants, including anthocyanins that reduce inflammation and protect DNA. A daily serving of mixed berries is an easy, enjoyable fertility boost.

Lentils and Legumes

Rich in plant-based protein, folate, iron, zinc, and fibre. Research from the Nurses' Health Study found that replacing animal protein with plant protein reduced ovulatory infertility risk. Lentils are particularly nutritious: one cup provides nearly 90% of the daily folate requirement.

Eggs

Provide comprehensive nutrition: quality protein, choline (important for fetal brain development), vitamin D, B12, and selenium. Eggs from pasture-raised hens have significantly higher omega-3 and vitamin D content.

What to Limit or Avoid During TTC

Certain foods and dietary patterns are associated with reduced fertility and should be minimised:

Alcohol

Even moderate alcohol consumption can impair fertility. A landmark study found that women consuming 5 or more drinks per week had significantly reduced conception rates. Alcohol disrupts oestrogen metabolism, impairs ovarian function, and reduces the number of eggs available for fertilisation. The safest approach when TTC is to avoid alcohol entirely, or at minimum limit to occasional low-quantity consumption outside the fertile window.

High-Mercury Fish

Swordfish, shark, king mackerel, tilefish, and bigeye tuna are high in mercury, which can accumulate in the body and harm developing neurological tissue. Limit these during TTC and pregnancy; opt for lower-mercury alternatives.

Trans Fats

Found in partially hydrogenated vegetable oils (some fried and processed foods), trans fats are strongly associated with ovulatory infertility — even small amounts. Read ingredient labels and avoid anything containing "partially hydrogenated" oils.

Refined Carbohydrates and Sugar

High-glycaemic foods spike insulin levels, which can disrupt ovulation (particularly in women prone to PCOS) and increase inflammation. Replace refined carbs with whole grain alternatives: brown rice instead of white, wholemeal bread instead of white, quinoa instead of pasta.

Excessive Caffeine

High caffeine intake (more than 200-300mg daily, roughly 2 cups of coffee) has been associated with reduced fertility in some studies. Moderate intake appears safe — limit to 1-2 cups of coffee per day during TTC.

Processed and Ultra-Processed Foods

These are typically high in trans fats, sugar, refined carbohydrates, and additives while being low in the nutrients that support fertility. A diet high in ultra-processed foods is consistently associated with poorer reproductive outcomes.

Supplementing Your Fertility Diet with Conceive Plus

Even the most carefully planned diet may leave gaps in fertility-critical nutrients. Conceive Plus fertility supplements are designed to complement a healthy diet by providing evidence-based nutrients at therapeutic doses, ensuring you're not leaving fertility to chance.

Conceive Plus supplements for women include key nutrients like folate, vitamin D3, CoQ10, inositol, iron, and zinc — specifically chosen based on the latest fertility research. Conceive Plus also offers men's formulations with targeted antioxidants and sperm-supporting nutrients.

Conceive Plus is trusted by couples in Hong Kong and around the world for its transparent, science-backed formulations. Whether you're just starting your fertility journey or have been trying for a while, Conceive Plus can help fill nutritional gaps that diet alone may not address.

Hydration and Fertility

Often overlooked, adequate hydration plays an important supporting role in fertility. Dehydration can thicken cervical mucus, making it less hospitable for sperm. Proper hydration also supports optimal blood flow to reproductive organs. Aim for at least 8-10 glasses (2-2.5 litres) of water daily, more in Hong Kong's humid climate. Herbal teas (particularly raspberry leaf and green tea in moderation) can contribute to fluid intake.

Meal Planning for Fertility: Practical Tips

• Build each meal around vegetables: Fill half your plate with colourful vegetables at every meal
• Eat protein at every meal: Include a protein source (legumes, fish, eggs, poultry) to stabilise blood sugar and support hormone production
• Choose whole grains: Replace refined carbs with whole grain alternatives throughout the day
• Snack on nuts and seeds: A small handful of walnuts, almonds, or pumpkin seeds provides fertility-supporting fats, proteins, and minerals
• Cook in olive oil: Replace vegetable or seed oils with extra virgin olive oil for anti-inflammatory benefits
• Eat fermented foods: Yoghurt, kefir, kimchi, and miso support gut health and oestrogen metabolism

Frequently Asked Questions About Fertility Diet

Q: Do I need to take supplements if I eat a healthy diet?

A: A healthy diet provides an excellent foundation, but certain nutrients — like folate (at therapeutic doses), vitamin D, and CoQ10 — are difficult to obtain in adequate amounts from diet alone. Most fertility specialists recommend a quality prenatal or fertility supplement alongside a healthy diet. Conceive Plus is formulated specifically for this purpose.

Q: Is a vegetarian or vegan diet compatible with fertility?

A: Yes, with careful planning. Vegetarians and vegans need to pay special attention to vitamin B12 (found almost exclusively in animal products), zinc, iron, omega-3s, and vitamin D. Supplementation and strategic food combinations (e.g., pairing plant-based iron with vitamin C) can ensure a nutritionally complete fertility diet.

Q: How quickly will dietary changes affect my fertility?

A: Like many aspects of fertility, dietary changes take time to show effects. Egg maturation takes 90 days; sperm take 74 days to develop. Most fertility specialists recommend making dietary and lifestyle changes at least 3-6 months before planned conception to give the changes time to impact egg and sperm quality. However, dietary improvements at any stage are beneficial.

Q: Can I drink green tea when trying to conceive?

A: In moderation, yes. Green tea contains some caffeine (about 30-50mg per cup versus 80-100mg for coffee) and antioxidants. The key is keeping total caffeine under 200mg daily. Herbal teas (chamomile, ginger, rooibos) are caffeine-free alternatives.

Q: Does soy affect female fertility?

A: The evidence on soy and fertility is mixed. Soy contains phytoestrogens (plant compounds that weakly mimic oestrogen). Some studies suggest moderate soy consumption may actually improve fertility outcomes; others suggest high consumption could potentially affect hormonal balance. Most research considers 1-2 servings of whole soy foods (tofu, edamame) per day to be safe. Concentrated soy supplements or isoflavone supplements are less well-studied and best avoided during TTC.

Q: Is organic food significantly better for fertility?

A: While organic produce has lower pesticide residues, the direct impact on fertility is not clearly established in research. However, given that some pesticides are endocrine disruptors, choosing organic for the "dirty dozen" most heavily sprayed crops (strawberries, spinach, apples, etc.) is a reasonable precaution when TTC.

Q: What is the best breakfast for fertility?

A: A fertility-supporting breakfast might include: Greek yoghurt with berries and walnuts, eggs with spinach and avocado on whole grain toast, or overnight oats with chia seeds and almond butter. These combinations provide protein, folate, omega-3s, antioxidants, and sustained energy without blood sugar spikes.

Q: Should both partners follow a fertility diet?

A: Absolutely. Since male factor contributes to about 50% of fertility challenges, optimising both partners' nutrition maximises the couple's overall fertility potential. The Mediterranean-style diet that benefits female fertility is equally beneficial for sperm health.