Foods for Fertility: What the Research Actually Shows
If you've searched for information on fertility and diet, you've probably noticed two things: it's hard to find much that's concrete about food specifically and what you do find is often conflicting or buried under supplement marketing — CoQ10, folate, vitamin D, the latest brand claiming to "support your hormones."
Does diet really affect fertility?
Yes — and there's a genuinely substantial, growing body of research behind it. Mediterranean-style eating patterns — plenty of vegetables and fruit, whole grains over refined ones, legumes, olive oil, oily fish, and less processed and red meat — show up consistently across the research as linked to better reproductive outcomes, in both women and men. This pattern is the closest thing the research has to a consistent, evidence-backed answer on fertility nutrition.
Specific nutrients found in these foods - folate, omega-3 fatty acids, antioxidants - show similar patterns. None of these are fringe findings; they have been replicated across different populations and study designs.
Specific foods and nutrients linked to fertility
Beyond the general pattern, some individual findings are genuinely striking. I’ve shared a few examples below that there are many other similarly specific, replicated associations:
Fibre: diets providing more than 21g a day have been linked to a higher chance of pregnancy than diets under 16g, with the average UK intake sitting right in the middle at around 18g¹ — that’s a truly actionable insight for a lot of people
Wholegrains: higher intake has been linked to a higher chance of implantation and live birth in women having IVF²
Vitamin C (citrus fruit, peppers, broccoli): intake has been linked to a shorter time to pregnancy in women under 35³
Full-fat dairy: women who consumed one or more servings a day (whole milk, heavy cream, full-fat yoghurt) had a 27% lower risk of anovulatory infertility than women eating less than one serving a week⁴
Foods and dietary patterns linked to worse fertility outcomes
The same body of research is just as consistent on the other side. Diets high in trans fats (found in processed and fried foods, some baked goods), refined carbohydrates, added sugar and heavily processed food are linked to poorer fertility outcomes. This isn't about eliminating entire food groups — it's about where the overall balance of your diet sits.
Why food affects fertility: the science explained
None of this is mysterious once you think about what's actually happening in the body. The reproductive organs need the same steady supply of nutrients as your heart, muscles or brain to do their jobs — whether that's producing hormones, maturing an egg, or building a uterine lining capable of sustaining a pregnancy.
An egg takes around 90 to 100 days to mature before it's ovulated, developing the whole time in a bath of follicular fluid whose composition is directly shaped by what's circulating in your blood — the antioxidants, the fatty acids, the blood glucose levels. Better-nourished blood means a better-nourished environment for that egg to grow in.
Diets higher in processed food and added sugar drive more oxidative stress and inflammation, both genuinely damaging to egg quality and to the uterine lining that has to support implantation. Diets richer in antioxidants, fibre and healthy fats do the opposite, calming that inflammatory load. The same logic carries through pregnancy itself — the nutrient stores you're building now are the raw materials for hormone production, DNA synthesis and cell division in the earliest, most critical stages of a pregnancy.
Why isn't this better known?
There are a few parts to answering this question. A supplement is a single, brandable thing - easy to put in a bottle, easy to make a specific claim about, easy to sell. A head of broccoli or a punnet of tomatoes isn’t marketable in the same way.
Diet research also tends to be built on associations rather than the kind of tightly controlled trials that are used to test a specific compound like CoQ10. This produces more nuanced, harder-to-headline conclusions that get expressed in probabilities and patterns rather than promises. Nuance just doesn't travel as well as bold claims.
And there’s also reasonable disagreement among researchers and practitioners about how large these effects are at an individual level. How much benefit really comes from changes made to the diet itself, versus other factors that tend to sit alongside it — better sleep, more movement, a healthier weight, more months spent trying?
The takeaway
There's no single, tidy source for a definitive answer on fertility nutrition — guidance varies depending on who you ask, and the research, while solid, is still evolving. What's consistent across most of it is the broad pattern: more whole, minimally processed food, more of the specific nutrients mentioned here, less of the ultra-processed options.
Supplements are a genuinely interesting area too, and deserve their own proper look rather than a few lines here — more on that soon.
Diet works alongside timing, underlying health conditions like PMOS and individual nutrient needs, not instead of them. If you want a practical starting point, the free 90 Day Egg Quality Plan walks through this in more depth. And if you’d like an individual look at what this means for you, my booking page is there. But wherever you get your information,I hope this gives you a clearer, evidence-based starting point.
