5 Fertility Boosting Diet Tips That WORK—No Matter Where You Live
April 7, 2023 No Comments
“Your labs look fine. It’s probably just egg quality.”
If someone has said a version of this to you, you know how it lands. It sounds like an explanation, but it’s actually the end of the conversation.
Nobody tells you what egg quality is. Nobody tells you how it was measured, because usually it wasn’t. And nobody tells you the most useful thing about it: the egg you’ll ovulate three months from now is developing right now.
That’s why learning how to improve egg quality starts with a window, not a supplement.
Most conversations about egg quality begin and end with age. Age does matter. But it’s one input into a system with many inputs, and it’s the only one you can’t change.
This guide is for you whether you’ve been told everything looks normal and nobody can tell you why pregnancy isn’t happening, or you’ve been handed a diagnosis like PCOS, endometriosis, low AMH, or “poor egg quality” and nothing you’ve tried has changed the outcome.
Both groups end up in the same place. Told that egg quality is the issue, without ever being told what’s actually driving it.
In nearly twenty years as a Certified Nutrition Therapist specializing in fertility, the conversation I have most often about egg quality isn’t about eggs. It’s about a number someone handed a woman with no explanation of what it did or didn’t mean.
That’s the part I want to fix. Because it’s rarely unexplained. It’s uninvestigated.
Key Takeaways
Egg quality refers to an egg’s ability to successfully undergo fertilization, continue developing, and ultimately contribute to a healthy embryo.
One of the most important factors involved is chromosomal health.
As women age, the likelihood of chromosomal abnormalities in eggs increases. This is one reason fertility and miscarriage rates change with age.
But egg quality is influenced by more than age alone.
Egg quality is influenced by more than age alone. The following factors can influence egg quality:
This is also why there isn’t a single blood test that can tell you exactly what your egg quality is.
If you’re trying to get pregnant, egg quality is only one piece of the fertility picture. Understanding how ovulation, hormones, sperm health, nutrient status, and other factors fit together can help you move beyond simply asking, “Is my egg quality okay?” and start asking what’s actually preventing pregnancy?
If you’re trying to get pregnant and looking for a solution-based, comprehensive approach, read my complete guide: What’s Actually Preventing Pregnancy and How to Fix It.
Unfortunately, there aren’t any.
An egg is a single cell, and single cells don’t produce symptoms. Everything you can feel across your cycle is produced by hormones: the bloating, the cramping, the mood shifts, the timing.
You can feel your hormones. You cannot feel your eggs.
Which means the symptom checklists you’ll find elsewhere are describing something else. What those lists get wrong, and the few patterns that genuinely do relate to egg quality will be covered in a future post: signs of poor egg quality and what people mistake for them.
Which raises the more useful question. If you can’t feel it, can you test it?
Not directly. There is no blood test that measures the quality of your eggs.
That single fact explains a great deal of the confusion around this topic, and a great deal of the frustration. Women are handed numbers that sound like they describe egg quality, told what those numbers mean, and then left to build a whole story on top of a test that was measuring something else.
So let’s go through what each test actually measures.
AMH and antral follicle count both measure quantity. Not quality.
AMH is produced by the small developing follicles in your ovaries, so the level reflects roughly how many follicles are in the remaining pool. Antral follicle count is an ultrasound count of the visible small follicles early in your cycle. The two usually track together, because they are measuring the same thing two different ways.
Read that again, because it is the whole point. AMH predicts how many eggs a stimulation cycle is likely to produce. It does not tell you what those eggs are capable of.
Which means both of these are true at the same time:
This is the number I spend the most time undoing. Women come to me saying they have been given an AMH result and, along with it, a conclusion. Low AMH gets heard as “your eggs are bad.” A normal AMH gets heard as “so it isn’t my eggs, which means nobody knows what it is.” Neither conclusion is supported by what the test measures.
“What’s My AMH?” and what it actually tells you about your fertility.
Day 3 FSH is an indirect signal. When the remaining follicle pool shrinks, the pituitary works harder to recruit follicles, so FSH rises. It tells you about the ovary’s responsiveness, not about the eggs themselves.
FSH is also a late marker. It typically rises only after AMH and antral follicle count have already declined, which means a normal FSH is not the reassurance it is often taken to be.
One detail that matters and is frequently missed: FSH has to be interpreted alongside estradiol. If estradiol is elevated early in the cycle, it can suppress FSH into a falsely normal-looking range. An FSH drawn without a same-day estradiol is a number you cannot fully interpret.
Here is what almost nobody tells women who have been through a retrieval.
If you have done an IVF or egg freezing cycle, your chart already contains the most direct information about your egg quality that exists. It is retrospective, so it cannot help you plan the cycle you already did. But it is real data, and most women have never had it explained to them.
Four numbers are worth asking for:
How many eggs were retrieved, and how many were mature. Not every egg retrieved is mature enough to fertilize. The gap between those two numbers is information.
Fertilization rate. Of the mature eggs, how many fertilized normally.
Blastocyst conversion rate. Of the embryos that fertilized, how many made it to day five or six. This is one of the more meaningful functional signals, because it reflects whether the egg carried enough capacity to power several days of development.
PGT-A results, if you did genetic testing. What proportion of tested embryos came back euploid.
An important caveat, and it is one you should hear from me rather than discover later: none of these numbers isolate the egg. Sperm quality, lab conditions, and the stimulation protocol all affect them. PGT-A tests a biopsy of the embryo, not the egg, and reflects both partners’ contributions.
So do not read a single cycle as a verdict. Read it as a pattern, alongside everything else.
What to actually do with this: ask your clinic for these four numbers, and then ask the more useful question. How do they compare to that clinic’s own averages for women your age? A fertilization rate means very little in isolation. Against your lab’s own benchmark it means quite a lot.
There is no direct test for egg quality. But there are a lot of tests that tell you about the environment your eggs are developing in, and in my experience most of them never get run.
| Marker | What usually happens | What I look at |
|---|---|---|
| Fasting insulin | Rarely ordered | Between 2 and 6 µIU/mL |
| HbA1c | Sometimes ordered | Below 5.4% |
| Fasting glucose | Almost always ordered | Normal here does not rule out a problem. Insulin rises years before glucose does |
| Ferritin | Ordered only if anemia is suspected | Below 70 ng/mL is low for fertility purposes, well above the standard deficiency flag |
| Vitamin D | Sometimes ordered | Lab "sufficient" starts at 30 ng/mL. I aim for 60 to 80 |
| Full thyroid panel with antibodies | Usually just TSH | TSH alone misses thyroid antibodies, which matter even when TSH looks normal |
| Homocysteine | Rarely ordered | Below 7.0 µmol/L |
| hs-CRP | Rarely ordered | Less than 1.0 mg/L |
None of these tell you what your egg quality is. All of them tell you something about whether the environment your eggs spent the last three months developing in was working for you or against you.
And that is the part that is actually modifiable.
When a woman is told her labs look normal, what that usually means is that the labs that were run looked normal. It is a much smaller statement than it sounds like.
It’s rarely unexplained. It’s uninvestigated.
If you haven’t done IVF, this section may look like it isn’t for you. Read it anyway. Understanding what these terms mean is what lets you evaluate the advice you’re given, whether or not you ever do a cycle.
Unfortunately these three terms get used interchangeably, including by people who should know better.
Egg quality is upstream of everything. It’s an egg’s capacity to fertilize, divide, and support development.
Embryo quality usually means grade, a visual assessment of how the embryo looks under a microscope. It’s a proxy, not a measurement of what the embryo is made of.
Euploid means chromosomally normal. That’s determined by PGT-A, not by appearance.
The simplest way to see how they relate is as a funnel. Every step loses some:
Eggs retrieved → eggs mature → eggs fertilized → embryos reaching blastocyst → embryos that are chromosomally normal.
Those are the same four numbers I told you to ask your clinic for above. Where your numbers drop off says something. Losing most eggs between retrieval and maturity is a different problem from losing most embryos between fertilization and blastocyst, which is different again from producing blastocysts that come back aneuploid.
Most chromosomal errors in embryos originate in the egg rather than the sperm, and that likelihood rises with age. That’s the single biggest reason egg quality dominates this conversation.
Nobody can change the results of a cycle that already happened. What you can influence is the environment the next batch of eggs develops in.
One of the most important concepts I want women to understand is that the egg you ovulate or retrieve today didn’t suddenly appear this week.
Eggs take months to mature.
Follicles containing eggs go through a long process of development.
While the exact biology is more complicated than saying “an egg takes exactly 90 days to develop,” a 1986 study published in Human Reproduction estimated that human follicular development takes approximately 85 days, helping explain why the roughly three months before ovulation are often considered an important period of follicular development.
That matters because it gives you something incredibly valuable: time.
During this period, the developing follicle and egg are supported by the hormonal, metabolic, nutritional, and cellular environment around them.
This doesn’t mean you can completely transform the quality of an egg in 90 days. It does mean there are modifiable factors worth addressing before ovulation or an egg retrieval.
Here is what that means practically. Count backward ninety days from the date you want to be pregnant, or from your retrieval date. That day has either already passed, or it is coming up soon. Knowing this tells you how much of the development window you still have, and that determines what’s worth prioritizing and what isn’t.
That is not pressure. It is a calendar. And it is the reason “let’s wait and see for a few more months” is such an expensive piece of advice. Every cycle you spend waiting is a cycle of egg development you have already spent.
There is a ninety-day plan at the end of this post that puts all of this in order.
If you’ve been trying to conceive for a while, you may be wondering:
“Have I already missed my chance?”
Not necessarily. But let’s be precise about what that means.
You do have control over factors such as:
You cannot:
That’s not a reason to give up. It’s a reason to focus your energy on the factors that are actually modifiable.
If you have time before trying to conceive or beginning an IVF cycle, those months aren’t meaningless. They are an opportunity.
Sperm has a development window too, and it’s almost exactly the same length as yours. Producing mature sperm takes roughly 72 to 90 days.
Which means the ninety days you’re using to support egg development is a window your partner has as well. You aren’t preparing alone. You’re both preparing, on the same clock, for the same cycle.
One thing worth knowing before he goes in for testing: a standard semen analysis reports count, motility, and morphology. It doesn’t measure DNA fragmentation, which is the integrity of the genetic material the sperm is carrying. A sample can look entirely normal on the standard three while carrying significant DNA damage, which means a couple can be told “his results are normal” without anyone having looked at it.
It’s rarely unexplained on either side. It’s often uninvestigated. Read more about how men’s hormones and health affect fertility.
Stop guessing. Start getting answers.
If you’ve been told everything looks normal, or you’ve been given a diagnosis and nothing has changed, the missing piece is almost never effort. It’s investigation.
Inside The Fertility Code, my high touch 12-week program, we identify the hidden drivers preventing pregnancy in your specific case and build a plan around your labs, your history, and your timeline. Over 90% of the women I work with go on to conceive.
See how The Fertility Code works →
Designed for women trying to conceive naturally or preparing for IVF.
You may have heard that fertility changes after 35. And while 35 is commonly used as a clinical reference point, reproductive aging is a continuum — not a switch that flips on a woman’s 35th birthday.
Think about optimization, not perfection.
The goal isn’t to “beat your age.” The goal is to support the eggs that are developing now.
Egg quality doesn’t exist in isolation. Eggs develop within your body, and the metabolic, hormonal, nutritional, and inflammatory environment around them is what matters.
Mitochondria are usually called the “powerhouses” of the cell. In an egg, that description undersells them.
A maturing egg is one of the most energy-hungry cells in the body. It has to complete meiosis, separate its chromosomes correctly, get fertilized, and then power the first several days of embryo division before the embryo can produce meaningful energy on its own. Every one of those steps runs on mitochondria. When mitochondrial energy production falters, chromosome separation is one of the first things affected.
A 2023 study published in Human Reproduction looked directly at human ovarian tissue and oocytes across a range of ages, and found three things worth knowing.
Protein oxidation and lipid peroxidation both increased significantly with age. Notably, DNA oxidation did not, which tells us the damage is happening to the machinery around the DNA rather than to the DNA itself.
The ratio of glutathione, the body’s master antioxidant, to its spent oxidized form shifted in the wrong direction, alongside a depletion of phospholipids.
And older eggs had partly abandoned efficient mitochondrial energy production in favor of glycolysis and backup pathways.
In plain terms: older eggs stop running on their best fuel system and start improvising.
This study doesn’t prove you can reverse that. But it does tell you exactly what is going wrong, and that changes what’s worth prioritizing during the ninety days an egg is developing.
Oxidative stress occurs when the production of reactive oxygen species exceeds the body’s ability to neutralize them.
Some oxidative stress is normal.
The goal isn’t to eliminate every free radical in your body, that isn’t possible or desirable.
The goal is balance.
Excessive oxidative stress can damage cellular structures, including lipids, proteins, and DNA.
Eggs are unusually vulnerable to oxidative stress. They sit in the ovary for decades, and unlike most cells they cannot easily repair accumulated damage. Supporting your antioxidant systems is not optional in fertility preparation. It is foundational.
And this is where food becomes much more interesting than simply taking an “antioxidant supplement.”
Inflammation is another piece of the fertility puzzle.
Acute inflammation is a normal and necessary biological process. Chronic, excessive inflammation is different.
Chronic inflammation changes metabolic function, hormone signaling, and reproductive function. That is not a controversial claim. What is harder to pin down is how much inflammation matters in any individual case, which is why it is worth measuring rather than assuming.
This doesn’t mean you need to follow an extreme “anti-inflammatory” diet. It means building a dietary and lifestyle pattern that supports healthy inflammatory regulation.
Your fertility does not exist separately from your metabolic health.
Insulin is not just a blood sugar hormone. Ovarian tissue carries insulin receptors, which means your ovaries respond directly to how much insulin is circulating. When insulin runs chronically high, it changes the hormonal environment around the developing follicle.
Here is what makes this so frustrating for the women I work with. A standard workup checks fasting glucose, sees a normal number, and moves on. But fasting glucose is one of the last markers to go wrong. Insulin rises first, sometimes for years, while glucose stays perfectly normal.
This is one of the first places I look. Fasting insulin. HbA1c. Sometimes continuous glucose monitoring, because seeing your actual response to your actual breakfast tells us more than any single blood draw.
Blood sugar is also the fastest lever on this entire list. You can start changing it at your next meal.
But the payoff is not measured in days. The follicle spends months drawing what it needs from the fluid around it, and that fluid reflects your bloodstream the entire time. One high-sugar day will not ruin an egg. Ninety days of spikes and crashes is the environment your egg develops in from start to finish.
If you have PCOS, this isn’t a side note. Insulin signaling is central to how PCOS affects ovulation, and it’s one of the most modifiable pieces of the whole picture. The full breakdown is here: how PCOS affects fertility and what actually helps.
Most content on this topic hands you a long list of things to avoid, presents them all as equally urgent, and leaves you feeling like your entire life is a threat to your fertility.
That is not what the evidence looks like. Some of these matter a great deal. Some matter a little. Knowing the difference is what lets you spend your energy well.
Here is my honest ranking.
Smoking has the strongest evidence and the largest effect. It accelerates the loss of ovarian reserve, and its byproducts reach the follicular fluid surrounding developing eggs. If you smoke and you are trying to conceive, this is not one item on a list of twenty. It is the item.
Alcohol is second, and the relationship is dose-related. Heavy drinking has clearer effects than occasional drinking, which is why the guidance you hear varies so much depending on who is giving it.
Chronic sleep debt and chronic stress come next, and they matter for a specific reason. They act through the same systems covered above: blood sugar regulation, inflammatory signaling, and hormone patterns. They are not a separate category of harm. They are inputs into the environment we have already been discussing.
Endocrine-disrupting chemicals are real, and they are also where most women overspend their effort. The exposures worth addressing are a small number of high-frequency ones: what you heat food in, what you drink from, what goes on your skin every single day. Attempting to eliminate every plastic, fragrance, and chemical from your life produces a lot of stress and very little additional benefit.
What all of these have in common is that they work through mechanisms you have already read about in this post.
Oxidative stress. Inflammation. Metabolic signaling. They are not a separate topic. They are the same topic, arriving from outside instead of inside.
Learn exactly how environmental toxins affect your fertility.
Now let’s get practical. There isn’t one magic intervention that improves egg quality.
Instead, think about creating the best possible environment for the eggs that are developing right now.
Here’s why food matters at the cellular level, and it’s more specific than “eat healthy.”
Your developing follicle sits in follicular fluid. That fluid is derived largely from your bloodstream, which means its composition reflects what’s circulating in your body: the nutrients you’ve absorbed, the antioxidants from your food, the state of your blood sugar. Your egg spends months developing in it.
So diet isn’t adjacent to egg development. It’s one of the inputs.
What we can’t say is which specific diet. A 2022 committee opinion published in Fertility and Sterility found that evidence is insufficient to conclude that a particular diet or macronutrient pattern improves natural fertility, while emphasizing the importance of a healthy overall diet and lifestyle.
That’s worth reading closely, because it isn’t the discouraging finding it looks like. It says no single dietary pattern has been proven superior. And it also says overall diet quality matters.
Which is exactly the point. You’re not looking for the right fertility diet. You’re building a pattern that consistently supplies what your body needs.
At every meal, focus on:
Quality matters most here. Aim to source the highest quality of foods you can afford. Animal foods are the most important to source organically.
Protein provides amino acids your body needs to build and repair cells. In my practice I aim for 100 to 120 grams of protein a day for most women preparing for conception or a retrieval, with at least 30 grams at breakfast. That is higher than standard guidance, and it is deliberate. Choose high quality, clean sources of both animal and plant-based protein sources. See list above for examples.
Rather than saving most of your protein for dinner, consider incorporating a meaningful protein source into breakfast, lunch, and dinner.
Omega-3 fatty acids are structural components of cell membranes and precursors to the compounds that regulate inflammation. A 2018 study published in Human Reproduction found that women with higher serum long-chain omega-3 levels had higher live birth rates in assisted reproduction, with each 1% increase associated with an 8% higher probability.
Good food sources of omega 3s include:
Start with food. Supplement when food is not getting you there, which is a question of what you actually eat and what your levels actually are.
Colorful plant foods provide a wide range of antioxidants and phytonutrients which helps to reduce oxidative stress and protect the integrity of the developing egg.
Think:
Don’t get hung up on one “fertility superfood”. Chia seeds aren’t going to transform your egg quality. Neither are blueberries. Neither is broccoli.
That isn’t an argument against any of them. Chia seeds earn a place in the rotation, and I’ve written about what chia seeds actually do for fertility for that reason. What they don’t do is carry the whole thing on their own.
A dietary pattern consistently rich in a variety of whole plant foods is what provides the nutrients and phytonutrients your body needs.
For the full breakdown of sleep, movement, stress, and alcohol, along with which supplements actually have evidence behind them, read my post on the best supplements for egg quality and what to skip.
Ninety days sounds like a long time until you try to plan it. Here is the order I use with clients, and the reason for the order.
To be clear about what this is: the sequence below is how a person implements changes, not about phases your body moves through. Nutrition, blood sugar, and sleep should stay consistent the entire time. What changes is how much information you have to work with.
If you have less than ninety days, do not skip to the end of the table. Start at day one anyway. The sequence still holds, it just compresses, and the testing step matters more rather than less when time is short.
If you’re preparing for IVF, the same biology applies. The eggs retrieved during an IVF cycle didn’t begin developing the week of your retrieval.
This doesn’t necessarily mean that three months of preparation will change the outcome of an IVF cycle. It means you’re addressing the factors that are actually modifiable before treatment begins to give yourself the best possible chance of retrieving high quality, genetically normal eggs.
Your pre-retrieval period is an opportunity to intentionally address the multitude of factors that influence egg quality. This doesn’t guarantee a better retrieval or embryo outcome. But it can help you enter treatment with as many modifiable factors addressed as possible.
There is no diet, supplement, or lifestyle routine that can guarantee better egg quality. And anyone promising otherwise is oversimplifying a very complex biological process. But “you can’t control your egg quality” is also an oversimplification.
You can’t change your age. You can’t increase your ovarian reserve. You can’t guarantee a chromosomally normal egg.
If you’ve been told everything looks normal but you’re still not pregnant, or you have a diagnosis like PCOS, endometriosis, or poor egg quality and nothing is working, there’s almost always something deeper that hasn’t been found yet.
Standard fertility testing rarely evaluates the factors that actually determine whether pregnancy happens: egg quality, ovulation quality, metabolic health, inflammation, nutrient status, and how your body responds to stress.
After nearly 20 years and over a thousand clients, I’ve found that most fertility struggles come down to a small number of hidden drivers preventing pregnancy. When those drivers are identified and addressed in the right order, the body responds.
That’s exactly what we uncover inside The Fertility Code, my 12-week, high-touch fertility program for women who are done guessing. We find what’s been missed and build a clear, personalized strategy around your body, your labs, and your history.
With 1:1 coaching, direct access between calls, lab reviews, evidence-based content, and structured accountability, you get expert eyes on your case so you can stop second-guessing and start moving forward with clarity.
Over 90% of the women I work with go on to conceive.
If you’re ready to finally understand what your body needs for a successful pregnancy and address what’s been missed, you can explore the program here → The Fertility Code.
Or schedule a free Fertility Strategy Call to see if the program is right for you.
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