Thinking Of Trying to Conceive? Read This First.
Most people start their prenatal vitamin the month they decide to try for a baby. I understand why — it's what everyone's told to do. But here's what that advice is missing: egg cells take roughly 90 days to mature, and sperm takes around 74 days to develop. The nutrients you put in your body right now are directly shaping the quality of those cells at conception. So starting a month before you want to conceive is, biologically, starting too late.
If I were trying for a baby, I'd start at least three to four months out. And I'd start by actually understanding what my hormones were doing before I added a single supplement.
Here's the full protocol I'd build — and the reasoning behind it.
Step One: Know What Your Hormones Are Actually Doing
There is no one-size-fits-all fertility protocol, because every woman's hormonal picture is different. What works beautifully for someone with low progesterone and a short luteal phase is completely different from what's needed for someone with elevated androgens and PCOS-driven cycle irregularity. So before doing anything else, I'd test.
The DUTCH Test
The DUTCH (Dried Urine Test for Comprehensive Hormones) is the most comprehensive hormone panel I use in practice for this purpose. It doesn't just measure estrogen, progesterone, testosterone, DHEA, and cortisol — it maps their metabolites, which tells you how your body is processing and clearing those hormones. That distinction matters enormously for fertility. High estrogen on a blood test looks completely different from high estrogen with poor metabolite clearance, and those two situations call for different interventions.
The DUTCH also shows cortisol rhythm across the day, which matters because chronic HPA axis dysregulation directly suppresses reproductive hormone production. Your body prioritizes survival over reproduction. If your stress hormones are chronically elevated, your fertility hormones take the hit.
Mira and Inito
For tracking the actual hormone landscape of your cycle in real time, Mira and Inito are tools I genuinely respect. Both use at-home urine testing to quantify LH, estrogen, FSH, and progesterone as they shift across the cycle — giving you real hormone data rather than the predicted ovulation windows you get from basal body temperature or standard OPKs. If your cycle is irregular, if you've recently come off hormonal birth control, or if you simply want to know what's actually happening in your body rather than make educated guesses, these devices are worth the investment. They've changed the way my patients understand their own cycles.
The Nutrients I'd Prioritize
A High-Quality Prenatal
The foundation — but not all prenatals are equivalent, and the difference matters. You want one with methylated folate (not folic acid, which requires a conversion step that many people struggle to make efficiently due to MTHFR gene variants), B12 as methylcobalamin, a full B-complex, and vitamin D3 paired with K2. Folate is critical for neural tube development in the very first weeks of pregnancy — often before someone even knows they're pregnant — which is exactly why starting months before you try gives you a meaningful buffer.
Most prenatals are also low in choline, iron, and DHA, which is why those often need to be supplemented separately.
Choline
This is the most under-discussed nutrient in preconception care, and most prenatals contain nowhere near adequate amounts. Choline is essential for fetal brain development and neural tube formation. It works alongside folate in one-carbon metabolism — the biochemical process underlying DNA synthesis and methylation — and supports placental function. The richest food sources are eggs and liver. If you're not eating those regularly, getting to optimal levels through diet alone is difficult. And if you have an MTHFR variant, choline becomes even more critical as a methyl donor, because your methylation pathway is already under more strain.
DHA
DHA is an omega-3 fatty acid that is non-negotiable in a preconception protocol. It's essential for fetal brain and eye development, and emerging research suggests it plays a meaningful role in egg quality and in reducing the risk of preterm labor. Unless you're eating fatty fish — wild salmon, sardines, mackerel — multiple times per week, you're likely not getting enough from diet alone. A high-quality fish oil or algae-based DHA (the cleaner option if you're plant-based or concerned about contaminants) covers the gap.
Iron
Iron deficiency is one of the most common nutrient deficiencies I see in clinical practice, and it is frequently missed because most doctors are looking at hemoglobin rather than ferritin. Ferritin is your iron storage protein, and it can be significantly depleted long before hemoglobin drops enough to flag anemia on a standard panel. For fertility specifically, adequate iron supports ovulation. Low ferritin is associated with anovulation and ovulatory dysfunction. If you have heavy periods, follow a plant-forward diet, or have never had your ferritin specifically checked, that number is one of the first things I'd want to see before building a fertility protocol.
CoQ10
CoQ10 — coenzyme Q10 — is one of the most evidence-backed supplements for egg quality, and the mechanism is straightforward once you understand it. Egg cells contain more mitochondria than virtually any other cell in the body. They need enormous amounts of energy to mature properly and to support the early cell divisions of a developing embryo. CoQ10 is the cofactor that makes mitochondrial energy production run. Our CoQ10 levels decline naturally with age — which is part of the biological reason egg quality declines with age — and supplementing helps restore that energy capacity at the cellular level.
Starting CoQ10 three to four months before trying gives your eggs a full maturation cycle to benefit from it. Ubiquinol is the more bioavailable form, and it's generally what I recommend for women over 35, since the body's ability to convert CoQ10 to ubiquinol also becomes less efficient with age.
NAC (N-Acetylcysteine)
NAC is a precursor to glutathione, your body's master antioxidant. Its relevance to fertility comes from two directions. First, NAC reduces oxidative stress — and oxidative damage to eggs and sperm is one of the primary drivers of reduced quality and failed fertilization. Second, NAC has meaningful evidence specifically for PCOS: it improves insulin sensitivity, supports ovulation induction, and can help regulate cycles in women with androgen excess. If you have PCOS, irregular cycles, or elevated androgens on testing, NAC is one of the first things I'd add to the protocol.
For the Men
Fertility is not a female-only issue. Sperm quality has declined significantly over the last several decades — we're talking a 50-60% decline in sperm count over the past 40 years in Western countries — and the three-to-four-month preconception window applies to men too. The main nutrients I'd prioritize for sperm health:
Zinc is critical for testosterone production and sperm motility. Selenium supports sperm structure and motility and protects against oxidative damage. CoQ10 has real data behind it for improving sperm count, motility, and morphology. Vitamins C and E reduce oxidative damage to sperm DNA. Folate supports the integrity of sperm DNA. L-carnitine supports sperm energy metabolism.
A good men's fertility formula will combine most of these. Lifestyle factors matter too: heat exposure from laptops, saunas, and hot baths impairs sperm production, as does smoking and heavy alcohol use. Because sperm regenerates on a roughly 74-day cycle, changes made now will show up three months later.
Foods That Build a Fertility-Supportive Foundation
Supplements work best when they're layered onto a nutrient-dense diet — not used to compensate for one that isn't. These are the food categories I'd focus on.
Dark Leafy Greens
Spinach, kale, arugula, collard greens, and Swiss chard are among the most nutrient-dense foods available for reproductive health. They're rich in folate (supporting the same methylation pathways as your prenatal), iron, magnesium, and antioxidants that protect egg and sperm DNA from oxidative damage. One to two generous servings daily is a meaningful baseline.
Magnesium-Rich Foods
Magnesium is involved in over 300 enzymatic reactions, including hormone production, blood sugar regulation, and stress response modulation. Deficiency is extremely common and is associated with increased inflammation, cortisol reactivity, and hormonal disruption. Pumpkin seeds, almonds, dark chocolate (70% cacao or higher), avocado, legumes, and leafy greens are the richest food sources. For women with PCOS, insulin resistance, or sleep disruption, magnesium is particularly worth prioritizing.
Berries
Blueberries, raspberries, strawberries, and blackberries are some of the most antioxidant-rich foods available. Antioxidants are what protect eggs and sperm from the oxidative damage that degrades quality over time, so eating them consistently across the preconception window is a genuinely useful habit. They're also lower glycemic than most fruits, which matters when you're trying to keep insulin levels stable and androgens in check.
Omega-3 Rich Foods
Wild salmon, sardines, mackerel, anchovies, walnuts, flaxseed, and chia seeds are the primary food sources. Omega-3 fatty acids support healthy egg quality, reduce systemic inflammation in the reproductive environment, and are critical for fetal brain development once pregnancy occurs. If fatty fish isn't showing up in your diet two to three times a week, a quality fish oil supplement closes that gap.
Starting Early Is What Changes the Outcome
The preconception window isn't about anxiety. It's about using the time you have. Egg quality, sperm quality, hormone balance, nutrient stores — these don't shift in a week. They shift over months. The women I work with who start this process well in advance consistently give themselves more options: more time to find and address anything that needs attention, and more confidence going into the process knowing they've done what was actually within their control.
Frequently Asked Questions
When should I start taking fertility supplements? Ideally three to four months before you plan to start trying. Egg cells take approximately 90 days to mature, and sperm takes around 74 days to develop. The nutrients in your body now directly shape the quality of those cells at conception.
What is the DUTCH test and why is it useful for fertility? The DUTCH test (Dried Urine Test for Comprehensive Hormones) is a comprehensive hormone panel that maps estrogen, progesterone, testosterone, DHEA, and cortisol — including their metabolites, which show how your body is processing and clearing those hormones. This matters for fertility because hormone metabolism issues can impair cycles, ovulation, and implantation even when basic levels look normal.
What's the difference between Mira and Inito for fertility tracking? Both are at-home urine-based hormone monitors that give you quantitative hormone data across your cycle — LH, estrogen, FSH, and progesterone — rather than a simple positive/negative result. Mira uses a wand and app system; Inito uses a phone attachment. Both are significantly more informative than standard OPKs, especially for women with irregular cycles or recent hormonal birth control use.
Why is CoQ10 recommended for egg quality? Egg cells have higher mitochondrial energy demands than almost any other cell in the body. CoQ10 is the cofactor that drives mitochondrial energy production. As CoQ10 levels decline naturally with age, so does the energy capacity of maturing egg cells. Supplementing — ideally as ubiquinol for women over 35 — helps restore that energy production across the 90-day maturation cycle.
Should my male partner take fertility supplements too? Yes. Sperm quality significantly affects both fertilization and early embryo development. Zinc, selenium, CoQ10, folate, and vitamins C and E are among the nutrients with the strongest evidence for sperm health. Because sperm regenerates on a 74-day cycle, starting three months before trying allows for a meaningful improvement window.
What foods support fertility? Dark leafy greens (folate, iron, antioxidants), berries (oxidative stress protection), magnesium-rich foods like pumpkin seeds and avocado, and omega-3 rich foods like wild salmon and sardines are among the most consistently supported by the research. These work together to reduce inflammation, stabilize insulin, and provide the raw materials for healthy hormone production and egg development.
Ready to Build Your Preconception Protocol?
If you're interested in working together, I offer a free 10-minute meet and greet. It's a chance to talk through where you are, what you've tried, and whether working together makes sense for you — no pressure, no commitment, just a real conversation with someone who takes this seriously.
Book your free 10-minute meet and greet here
Medical Disclaimer: The information provided on this page is for educational and informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease or health condition, and it does not constitute medical advice. This content is not a substitute for professional medical guidance, diagnosis, or treatment. Always consult with a qualified, licensed healthcare provider before beginning any new supplement protocol, making dietary changes, or modifying your current health plan.