Does What You Eat Actually Matter?
Short answer: yes, but maybe not in the way Instagram influencers suggest. You don't need a $200 supplement stack or a "fertility cleanse." What you do need is consistent, sensible nutrition. Research — real, peer-reviewed research — shows that dietary patterns can influence ovulation, egg quality, sperm health, and IVF outcomes. It's not magic, but it's one of the few things you can actually control.
The Mediterranean Diet: The Closest Thing to a "Fertility Diet"
If there's one dietary pattern that keeps showing up in fertility research, it's the Mediterranean diet — heavy on vegetables, fruits, whole grains, olive oil, fish, and legumes, with moderate dairy and limited red meat. It's anti-inflammatory, supports insulin sensitivity, and provides the micronutrients that matter for egg and sperm development.
You don't need to be perfect about it. The goal is a pattern, not a prescription.
Foods That Help
Leafy greens and vegetables: Spinach, kale, broccoli, and asparagus are loaded with folate, which is critical for early fetal development and has been linked to better egg quality. Eat them daily if you can.
Fatty fish: Salmon, sardines, and mackerel give you omega-3 fatty acids, which support healthy inflammation levels and have been associated with better IVF outcomes. Aim for 2–3 servings per week.
Whole grains: Brown rice, quinoa, oats, and whole wheat provide steady energy and fiber. They help regulate blood sugar — important because insulin resistance can disrupt ovulation.
Healthy fats: Avocados, olive oil, and nuts. Full-fat dairy (in moderation) has actually been linked to better fertility outcomes than low-fat dairy in some studies — which surprised a lot of people.
Plant protein: Beans, lentils, and chickpeas. Some research suggests that replacing some animal protein with plant protein may improve ovulatory function.
Berries and antioxidant-rich fruits: Blueberries, strawberries, and pomegranates provide antioxidants that may protect eggs and sperm from oxidative damage.
What to Cut Back On
Trans fats: Found in some fried foods, commercial baked goods, and packaged snacks. Strongly linked to ovulatory infertility. Check ingredient labels for "partially hydrogenated" oils.
Excess sugar and refined carbs: White bread, sugary drinks, pastries. They spike insulin, which can disrupt hormone balance — especially problematic for women with PCOS.
Alcohol: Even moderate drinking may reduce fertility in both men and women. Most REs recommend cutting it out entirely during treatment, and limiting it while trying naturally.
Caffeine: Moderate caffeine (under 200mg/day — about one regular coffee) appears to be fine. But heavy caffeine intake has been associated with longer time to conception and higher miscarriage risk.
Processed and ultra-processed foods: High in sodium, additives, and the wrong kinds of fats. They crowd out the nutrient-dense foods your body actually needs.
High-mercury fish: Swordfish, king mackerel, tilefish, and shark. Mercury is toxic to developing nervous systems. Stick to low-mercury options like salmon, shrimp, and tilapia.
Supplements That Are Worth Taking
Prenatal vitamin: Start at least 3 months before treatment. Make sure it includes folic acid (at least 400mcg, ideally 800mcg).
CoQ10: 400–600mg daily. This antioxidant supports mitochondrial function in eggs. Research is promising, especially for women over 35.
Vitamin D: Many fertility patients are deficient. Get your levels tested — your RE can advise on dosing.
Omega-3s (if you don't eat fish): A fish oil or algae-based supplement fills the gap.
For men: A male fertility supplement with zinc, selenium, L-carnitine, and CoQ10 can support sperm quality. Results take 2–3 months since sperm development takes about 74 days.
The 90-Day Window
Here's why timing matters: eggs take about 90 days to mature before ovulation, and sperm take about 74 days to develop. That means the food you eat today is influencing the eggs and sperm that will be used 3 months from now. If you're planning IVF or starting to try, cleaning up your diet at least 3 months ahead gives you the best shot at making a difference.
Keep It in Perspective
Diet matters, but don't let it become another source of stress. You don't need to be perfect. You don't need exotic superfoods. Eat real food, mostly plants, not too much junk, take your prenatal, and leave the guilt at the door. Talk to your RE or a nutritionist if you want personalized guidance — and use the Fertility Clinic Finder to find a clinic that takes a holistic approach to patient care.
Good nutrition matters whether you're pursuing IUI, IVF, or trying naturally. Ready to talk to a specialist? Get matched with a fertility clinic near you.