Fertility Diet: What to Eat When Trying to Conceive
What the research says about diet and fertility — covering the Mediterranean pattern, key nutrients, and foods to limit when trying to conceive.
<!-- H2 not in keyword doc — used card title as fallback for iron/ferritin content; merged into "How important is nutrition when preparing for IVF?" --> <!-- Keyword doc H2s "What does research say about dairy and fertility?", "Does sugar intake affect fertility?", and "Is intermittent fasting safe when trying to conceive?" have no corresponding source card content and were omitted to avoid adding unsupported clinical claims. --> Nutrition for fertility gets tangled up in diet culture quickly — eliminate this, optimize that, eat only at certain times. The actual research is clearer and considerably less complicated than the noise suggests. One eating pattern consistently shows up in the evidence, and it doesn't require elimination, perfection, or a complete overhaul of how you eat.
What is the best diet for fertility?
A Mediterranean-style eating pattern is the most studied and most consistently supported eating approach for fertility. It centers on vegetables, whole grains, healthy fats, lean protein, and legumes — the foods that support overall metabolic health and reduce systemic inflammation. No foods are eliminated; the pattern is defined by what you add and emphasize, not by strict rules about what to cut. For fertility specifically, it's the single eating approach with the strongest body of research behind it.
Does the Mediterranean diet improve fertility outcomes?
The Mediterranean pattern has more research support for fertility than any other dietary approach. Part of that evidence comes from large datasets including the Nurses' Health Study, one of the most extensive investigations into diet and female fertility. Swapping some animal protein for plant protein — legumes, nuts, seeds — is one of the specific shifts associated with better ovulation outcomes in that research. The overall pattern also supports metabolic health broadly, which has downstream effects on hormone regulation and cycle regularity.
What foods are associated with better egg quality?
Increasing plant protein relative to animal protein is associated with better ovulatory function in the research — lentils, beans, nuts, and seeds are the practical versions of this shift. Folate-rich foods also matter: leafy greens, lentils, and asparagus provide folate in a form the body can use immediately, unlike folic acid from supplements, which takes weeks to build up in the system. Combining folate from food with a folic acid or methylated folate supplement gives the most complete coverage — the full supplement picture is covered in the Clinical Essentials deck.
What foods should you limit when trying to conceive?
Trans fats are the clearest dietary signal in the fertility research — they're associated with worse fertility outcomes in both people with ovaries and people with sperm. They appear on ingredient labels as "partially hydrogenated" oils and are found in some processed and packaged foods. Caffeine is worth moderating rather than eliminating: intake under 200mg per day — roughly one cup of coffee — appears safe based on current evidence. More than that is associated with longer time to conception. High caffeine intake also affects sperm quality at higher doses, so moderate intake for both partners is the evidence-based approach.