A Mediterranean-style diet is the single best-studied eating pattern for IVF success, with research showing that couples who follow it closely are 40 to 100% more likely to achieve a clinical pregnancy. Live birth rates were 2.5 times higher among women with strong adherence to this way of eating. That means your plate should center on vegetables, fruits, whole grains, legumes, fish, olive oil, and nuts, with limited red meat and processed food.
But IVF isn’t one moment. It’s a months-long process with distinct phases, and your nutritional priorities shift at each stage. Here’s what to focus on and why.
Before You Start: Building a Foundation
The weeks leading up to your cycle matter. Egg development takes roughly three months, so what you eat in the 90 days before retrieval influences the quality of the eggs your body recruits. This is the window to clean up your overall diet rather than obsess over any single food.
Focus on whole, minimally processed foods. Swap refined carbohydrates like white bread, pastries, and sugary cereals for whole grains, sweet potatoes, and legumes. Low-glycemic carbohydrates help keep insulin levels stable, which is especially important if you have PCOS. Research on women with PCOS shows that low-glycemic diets improve insulin sensitivity, and insulin plays a direct role in how your ovaries function.
To support your uterine lining, prioritize iron-rich foods like spinach, lentils, and lean red meat. Vitamin E from almonds, sunflower seeds, and avocados helps improve blood flow to the uterus. Antioxidant-rich fruits, particularly berries, pomegranates, and citrus, protect cells from oxidative damage during the long process of egg maturation.
During Ovarian Stimulation
Once you begin injectable medications, your ovaries are working overtime to develop multiple follicles. This is a metabolically demanding phase, and your body needs more protein and fluids than usual.
Aim for at least 60 grams of protein per day during stimulation. That’s roughly equivalent to two chicken breasts, or a combination of eggs, Greek yogurt, fish, and legumes spread across the day. Protein supports follicle development and helps your body manage the fluid shifts that come with stimulation medications.
Hydration becomes critical during this phase. Drink at least 1.5 liters of water daily, and more if you’re active or it’s warm outside. As your ovaries enlarge, you may feel bloated and lose your appetite. Smaller, more frequent meals tend to be easier to manage than three large ones. Soups, smoothies, and bone broth can help you get both fluids and nutrients when solid food feels unappealing.
Healthy Fats and Egg Quality
Omega-3 fatty acids from salmon, sardines, walnuts, and chia seeds are a staple recommendation during IVF. They reduce inflammation throughout the body and support blood flow to the reproductive organs. One study published in Fertility and Sterility that measured omega-3 levels in red blood cells found no direct correlation with embryo morphology or fertilization rates. But that doesn’t mean they’re unimportant. Omega-3s contribute to the overall anti-inflammatory environment that the Mediterranean diet creates, and their benefits likely work in concert with other nutrients rather than in isolation.
Monounsaturated fats from olive oil, avocados, and nuts are equally valuable. Use extra virgin olive oil as your primary cooking fat. These fats help your body absorb fat-soluble vitamins like D and E, both of which play roles in reproductive health.
After Egg Retrieval
The 24 to 72 hours after retrieval are a recovery period, and your diet can make a real difference in how you feel. The biggest concern is ovarian hyperstimulation syndrome (OHSS), a condition where fluid leaks from swollen ovaries into the abdomen, causing bloating, nausea, and sometimes serious complications.
Women at higher risk for OHSS are often advised to eat a high-sodium, high-protein diet after retrieval, along with generous amounts of electrolyte-rich fluids like sports drinks or coconut water. This helps your body retain fluid in the bloodstream rather than letting it pool in the abdomen. Salty broths, pretzels, and yes, even a fast-food cheeseburger can serve this purpose. This is not the time to restrict salt.
Keep protein intake high (continuing at 60 grams or more) and sip fluids throughout the day. Avoid carbonated drinks if you’re already bloated. Gentle, easy-to-digest meals like scrambled eggs, miso soup, and avocado toast work well when your abdomen is tender.
Around Embryo Transfer
In the days surrounding your transfer, the goal is to support a receptive uterine lining. Many of the same foods that help during preparation continue to matter here. Iron-rich greens and lentils, vitamin E sources like almonds and sunflower seeds, and omega-3 rich fish all support blood flow to the uterus and contribute to endometrial health.
Pineapple core is a popular recommendation in IVF communities because it contains bromelain, an enzyme with mild anti-inflammatory properties. There’s no clinical evidence that it improves implantation rates, but it’s not harmful in small amounts. If it makes you feel proactive, there’s no reason to avoid it.
What does matter is keeping your blood sugar steady. Eat balanced meals that pair protein with complex carbohydrates and fat. Think grilled salmon with quinoa and roasted vegetables, or a lentil stew with whole grain bread. Avoid large spikes in blood sugar from sugary snacks or refined carbs, which can trigger inflammation.
What to Limit or Avoid
Caffeine should stay at or below 200 milligrams per day throughout your cycle, roughly one to two cups of regular coffee. This is the same threshold recommended during pregnancy. Remember that tea, chocolate, and some sodas also contribute to your daily total.
Alcohol is best eliminated entirely during an IVF cycle. Even moderate drinking has been linked to reduced fertility outcomes, and once you’re in the two-week wait after transfer, you could be pregnant.
Fish is encouraged, but high-mercury species need to be avoided. Skip shark, swordfish, king mackerel, and tilefish entirely. Limit albacore (white) tuna to 6 ounces per week. Low-mercury options like salmon, shrimp, cod, and sardines are safe at two to three servings per week and provide the omega-3s and protein your body needs.
Raw or undercooked foods carry infection risks that are worth eliminating during treatment. This includes sushi with raw fish, unpasteurized cheeses, raw sprouts, and undercooked eggs or meat. Listeria and other foodborne infections can be especially harmful during early pregnancy.
Age and Diet: What the Research Shows
The benefit of the Mediterranean diet appears to vary with age. One study found that live birth rates and clinical pregnancy rates improved significantly in women 35 and younger who followed the diet closely. For women over 35, the picture was less clear. A separate study found a marginally reduced risk of IVF failure in older women who followed the diet at an intermediate level, but the effect was smaller. Interestingly, one study reported that women eating a Mediterranean diet had a 70% poorer ovarian response to stimulation medications, suggesting that diet alone can’t override the biological realities of ovarian reserve.
This doesn’t mean diet is pointless if you’re over 35. It means that dietary changes are one piece of a larger puzzle, and expectations should be realistic. A good diet creates the best possible environment for whatever eggs your body produces.
A Sample Day on an IVF Plate
- Breakfast: Two eggs scrambled with spinach and feta, a slice of whole grain toast with avocado, and a small handful of berries
- Snack: Greek yogurt with walnuts and a drizzle of honey
- Lunch: Lentil soup with a side salad dressed in olive oil and lemon, plus a piece of whole grain bread
- Snack: Apple slices with almond butter
- Dinner: Baked salmon with roasted sweet potatoes and steamed broccoli
This hits the protein target, provides iron and vitamin E from whole foods, keeps blood sugar stable, and follows the Mediterranean pattern that the research supports. Adjust portions based on your body’s needs, especially during stimulation when appetite can fluctuate dramatically.