The Fertility Diet: What the Evidence Actually Shows
The Foundation: Mediterranean Diet
The most robust nutritional evidence for fertility is the Mediterranean diet. A landmark ESHRE-published cohort study found women who closely followed this pattern in the 6 months before IVF had a 40% higher live birth rate than those who did not, for women under 35.
What this includes:
- Vegetables (5+ servings daily) — leafy greens, tomatoes, cruciferous vegetables
- Legumes (lentils, chickpeas, beans) — folate and plant protein
- Whole grains (oats, brown rice, quinoa) — stabilise insulin
- Olive oil as the primary fat
- Oily fish (salmon, sardines, mackerel) 2–3×/week — omega-3 DHA for egg quality
- Nuts and seeds — Vitamin E, selenium, zinc
- Moderate full-fat dairy
- Moderate poultry and eggs
Specific Foods With Fertility Evidence
Oily fish: DHA is concentrated in follicular fluid and critical for egg maturation. Sardines, salmon, and mackerel are richest sources. Algal omega-3 supplements are equivalent for those who do not eat fish.
Walnuts: The only nut with significant omega-3. A UCLA RCT: men adding 75g of walnuts daily for 12 weeks showed significant improvement in sperm motility and morphology.
Full-fat dairy: Harvard Nurses Health Study: full-fat dairy associated with better ovulatory function vs low-fat. Swap low-fat yogurt for full-fat.
Avocado: Rich in monounsaturated fat and folate. A study of women undergoing embryo transfer found higher avocado intake associated with higher live birth rates — linked to anti-inflammatory endometrial effects.
What to Reduce or Avoid
- Ultra-processed foods: Strongly linked with longer time to pregnancy and lower IVF success
- Trans fats: Associated with ovulatory infertility in Harvard Nurses Health Study
- Excess sugar and refined carbohydrates: Disrupt insulin signalling — particularly important in PCOS
- Caffeine: Limit to under 200mg/day (~2 cups coffee). Above 300mg/day associated with modestly reduced fertility and higher miscarriage risk
- Alcohol: No established safe threshold during conception attempts. ASRM advises abstinence during IVF cycles
- BPA from plastics: Endocrine disruptor linked to reduced egg quality. Use glass or stainless steel for hot food and drinks
Evidence-Based Supplements
Women:
- Folic acid / methylfolate: 400–800mcg (start 3 months before) — non-negotiable
- Vitamin D: 1000–2000 IU if deficient (test first; optimal >30 ng/mL)
- CoQ10 ubiquinol: 200–600mg daily (egg quality, especially >37)
- Omega-3 DHA: 1000–2000mg
- Myo-inositol: 4g daily (PCOS specifically — endorsed by PCOS 2023 guideline)
Men:
- CoQ10 ubiquinol: 200–400mg (motility)
- Vitamin C + E: 1g + 400IU (DNA fragmentation)
- Zinc: 66mg (sperm production)
- L-carnitine: 2g (motility)
- Selenium: 100–200mcg
Indian Fertility Diet Tips
Traditional Indian cuisine is naturally fertility-friendly: dal (folate, zinc), palak/spinach (folate, iron), eggs (protein, choline), nuts and seeds (almonds, walnuts, pumpkin seeds), ghee in moderation. Avoid: daily deep-fried foods, excess maida products, packaged snacks high in trans fats.
Reference: ASRM 2022 — Nutritional Supplements. ESHRE 2023 — Diet and Lifestyle.
Frequently Asked Questions
What should I eat to get pregnant faster?▾
Follow a Mediterranean diet: abundant vegetables, legumes, whole grains, oily fish 2–3×/week, olive oil, nuts, and full-fat dairy. Start folic acid 400mcg daily. Correct Vitamin D deficiency. Reduce ultra-processed foods, refined carbohydrates, alcohol, and caffeine above 200mg/day.
Does folic acid help with fertility?▾
Folic acid primarily prevents neural tube defects (spina bifida) — reducing risk by 70% when taken before conception. It is most effective when started 3 months before trying. Some evidence also supports ovulation and endometrial health. It is the most universally recommended pre-conception supplement.
Is CoQ10 worth taking for fertility?▾
CoQ10 ubiquinol (200–600mg daily) has moderate evidence for improving egg quality — particularly in women over 37 or those with diminished ovarian reserve. Two RCTs showed improved IVF outcomes. It must be taken for at least 3 months to show effect. The ubiquinol form is better absorbed than ubiquinone.