The Fertility Diet Red Flags No One Talks About (That Could Be Quietly Delaying Your Pregnancy)
You've downloaded the apps, you're tracking your cycle, and you're already taking your prenatal. You've done the reading. You're doing the things. So why does it still feel like your body isn't cooperating?
Here's what I want you to consider: eating well and eating for fertility are not always the same thing. There are patterns that look completely healthy on the surface, for example eating salads, smoothies, carefully checking labels for sugars and fats. However this can be quietly working against your hormones, your cycle and your chances of conceiving.
I’m going to walk you through the issues I see most often as a Holistic Nutritionist and what to do about them.
Why eating “healthy” isn't always good for fertility.
You can imagine a person who eats salads and smoothies everyday, takes prenatals and avoids processed foods (maybe you can imagine them because this is you). This looks healthy at a glance but are you really getting everything you need to support your cycle, hormones and egg or sperm quality?
Protein is the building block of hormones, so that kale and blueberry salad might be full of ‘superfoods’ but you're missing essential nutrients for fertility health. This is just one example of something that might be quietly sabotaging your chances. These kinds of meals look healthy on the outside but they are missing a lot of support needed for conception.
Red Flag 1
You're eating fats but missing the right ones.
Healthy fats like omega 3s, polyunsaturated and monounsaturated are well known for supporting hormones and overall health but here’s what often surprises people, saturated fat matters too! Your eggs are literally made of it. It’s important to get a good range of all these fats from quality sources. Think grass-fed butter or beef, coconut products, and full-fat dairy if you tolerate it. Full-fat dairy in particular has been shown to be more supportive of fertility than its low-fat counterpart.[1] What to move away from are refined vegetable oils like canola and sunflower, which promote inflammation when consumed regularly. Swap them for avocado oil or olive oil instead.
Red Flag 2
Your ‘clean’ diet’ might be too low in calories.
If you have irregularity in your cycle or ovulation patterns, one of the first things I look at is whether someone is eating enough. Our generation grew up in the ‘low fat’ and ‘low calorie’ era and although that has all been debunked the habits and mindsets it created can be hard to shake.
You may also have been told you need to lose weight to get pregnant but drastically cutting calories and undereating has been shown to be ineffective. Not only is it unsustainable, it can also be the reason you aren't losing weight, if your body perceives too much stress. Eating enough, particularly enough protein and fat is one of the most foundational things you can do for your hormone health and your cycle.
Red Flag 3
You're drinking more caffeine than your hormones can handle
I am absolutely not here to take away your morning coffee. When it starts to be an issue is when we're drinking multiple cups throughout the day. The threshold most research points to is around 200mg daily, which sounds like a lot until you know that a tall Starbucks blonde roast already puts you at 270mg just with your first coffee.
Caffeine stimulates cortisol production, and when cortisol is chronically elevated it competes with and disrupts the hormones that regulate your cycle and support ovulation particularly progesterone. It also affects how your liver processes estrogen. A useful first step is simply adding up your actual daily intake across coffee, tea, matcha and any pre-workout, most people are genuinely surprised by where they land.
Red Flag 4
Your blood sugar is more unstable than you realise
Blood sugar instability is one of the most common things I see in women who genuinely believe they're eating well and it makes sense, because the culprits are foods we've been told are healthy. An oat-based breakfast or a morning smoothie can spike blood sugar quickly if they're not balanced with protein, fat and fibre. Over time, repeated blood sugar spikes drive inflammation, and chronic inflammation is a significant contributing factor in PCOS, implantation dysfunction and unexplained infertility. This is one of the first things I address with every client because the effects on fertility are so significant and the fixes, once you know what to look for, are very manageable.
Red Flag 5
You're taking the wrong prenatal
Research shows that approximately 90–95% of pregnant women consume less than the recommended intake of choline alone and most prenatal vitamins don't even contain it.[2] This is just one example of the gap between what the label promises and what your body actually needs. There is a huge variation in quality. Are the nutrients in a bioavailable form, are they 3rd party tested, Is there even enough of each nutrient? RDAs were established decades ago on limited population data, meaning even well-formulated prenatals may not be hitting truly optimal levels for preconception.
I always follow a food first mindset, but given how nutrient depleted our soil has become and how demanding preconception is on the body, a high-quality prenatal is a genuinely important backup. Not all of them earn that description. If you want guidance on what to look for, this is something I work through with every client individually.
Red Flag 6
You're unknowingly consuming foods that disrupt your endocrine system
Endocrine disruptors are found in produce, meats, foods and drinks heated in plastics and certain soy products. Eating organic is a great way to avoid some of these chemicals in food. However it can be expensive (and things are already expensive enough right now) One strategy can be to follow the EWG’s (Environmental Working Group) ‘dirty dozen’. Every year they release the 12 foods that have the highest concentration of pesticides. When I shop, if I buy any of these 12 products I go for organic and buy conventional for the rest.
For meats and dairy go grassfed or organic. Try to avoid foods and drinks that are heated in plastic or stored in plastic while hot. On the topic of soy specifically, it often gets a bad reputation in fertility circles, Research actually suggests soy can be neutral to beneficial for fertility outcomes in women trying to conceive the real concern is pesticide exposure, which is why organic matters here.[3]
Red Flag 7
The Missing Piece
This one is connected to everything we’ve talked about and more, your immune system, your inflammation levels and your hormone health. It is one of my core phases I go through with my clients and it's almost always something they have never considered before.
I've put everything you need to know into a free guide.
It's called The Missing Piece. Inside you'll find out what Red Flag 7 actually is, a checklist to see if it applies to you, why it matters so much for fertility specifically, and three recipes to help you start addressing it right away.
Click here:
I want to know what’s missing
This is a lot to consider and when working with clients I never recommend you try to change all of these things at once. The best and most realistic approach is to choose 1. If you reflect on what I just laid out, which one do you think could be the biggest red flag for you? Start with 1 less coffee a day. Or next time you go shopping grab the organic spinach instead of the regular. It can take around 3 months to see real change from changing dietary habits that can help with getting pregnant so it's a marathon not a sprint.
In my work with clients, one of the most common things I hear is that nutrition was never meaningfully addressed in any of their fertility consultations. Their doctors and care providers were wonderful but nutrition simply isn't what they're trained in. We now know that what you eat has a measurable impact on fertility outcomes, time to conception, and pregnancy health. I'm here to fill that gap.
Ready to find out what Red Flag 7 is? It's the one piece almost nobody talks about and it could be the most important thing you read this year.
My free guide The Missing Piece includes:
What Red Flag 7 actually is
A simple checklist to see whether it applies to you
Why it's so directly connected to fertility outcomes
Three recipes to help you start addressing it straight away
Get it here:
I want to know what I’m missing
References
Chavarro JE, Rich-Edwards JW, Rosner B, Willett WC. A prospective study of dairy foods intake and anovulatory infertility. Human Reproduction. 2007;22(5):1340–1347. https://academic.oup.com/humrep/article/22/5/1340/2914869
Mun JG, Legette LL, Ikitimur-Aritmur B, Cornish SM. (2019). Choline and DHA in Maternal and Infant Nutrition: Synergistic Implications in Brain and Eye Health. Nutrients, 11(5), 1125. https://pmc.ncbi.nlm.nih.gov/articles/PMC6566660/
Vitale SG et al. The role of soy and soy isoflavones on women's fertility and related outcomes: an update. Journal of Nutritional Science. 2022;11:e17. https://pmc.ncbi.nlm.nih.gov/articles/PMC8922143/
