If you have spent any time on fertility social media, you have seen the claims. Eat pineapple core after your transfer. Drink pomegranate juice every morning. Cut out gluten, dairy, sugar, caffeine, and probably anything you actually enjoy.
The fertility nutrition space is overwhelming, and much of it is driven by anecdote and influencer marketing rather than science. When you are a solo mom by choice making every decision on your own, you want to know that the choices you make with your body are backed by real evidence, not Instagram ads.
So let's cut through the noise.
The Fertility Diet: What Harvard Found
The most robust research on diet and fertility comes from the Harvard Nurses' Health Study, one of the largest prospective studies ever conducted on women's health. Researchers followed over 18,000 women and identified a dietary pattern associated with significantly lower rates of ovulatory infertility.
Women who closely followed what researchers called the "fertility diet" had a 66% lower risk of ovulatory infertility and a 27% lower risk of infertility from other causes.
The pattern included:
- More plant-based protein (beans, lentils, nuts) and less red meat
- Full-fat dairy rather than low-fat
- Whole grains instead of refined carbohydrates
- Iron from plant sources and supplements
- Monounsaturated fats (olive oil, avocado) rather than trans fats
An important caveat: these findings apply primarily to ovulatory dysfunction. If your infertility has a different cause, dietary changes alone may not move the needle. But the pattern is consistent with general health, so there is little downside to eating this way.
The Mediterranean Diet and IVF Success
If there is one dietary pattern that shows up consistently in fertility research, it is the Mediterranean diet. And the evidence is more than anecdotal.
A prospective cohort study published in Human Reproduction found that women under 35 who scored higher on the Mediterranean Diet Scale were approximately 2.7 times more likely to achieve clinical pregnancy and live birth during IVF. A 2024 narrative review of seven observational studies involving 2,321 women confirmed that higher Mediterranean Diet scores were associated with improved clinical pregnancy rates and live birth rates.
The Mediterranean diet is rich in:
- Vegetables, fruits, and legumes
- Whole grains
- Fish and olive oil
- Nuts and seeds
- Moderate amounts of poultry and dairy
- Minimal processed foods and added sugars
What makes this diet likely beneficial for fertility is its anti-inflammatory and antioxidant profile. Chronic inflammation and oxidative stress can damage egg quality, and the Mediterranean diet actively combats both.
Supplements: What the Evidence Supports
The supplement aisle is a minefield for women trying to conceive. Here is what peer-reviewed research actually supports.
Folic Acid
This is the one supplement with near-universal agreement. Folic acid prevents neural tube defects and is recommended for all women trying to conceive. A cohort study found that women taking 800 or more micrograms per day of supplemental folic acid had a 20% higher probability of live birth during IVF.
Most prenatal vitamins contain 800 to 1,000 mcg. Start taking one before you begin treatment, not after.
CoQ10
Coenzyme Q10 has shown promise for egg quality, particularly in women over 35. A randomized controlled trial found that women who took 200mg per day of CoQ10 for 30 to 35 days before stimulation had improved oocyte maturation and better early embryo quality. The fertilization rate was 67.5% in the CoQ10 group, and significantly fewer transfers were cancelled due to poor embryo development (8.3% versus 22.9% in the control group).
However, a meta-analysis of five trials found no statistically significant effect on live birth rates. CoQ10 may improve intermediate markers like egg quality without definitively improving final outcomes. Promising, but not proven.
Vitamin D
Low vitamin D levels are common in women undergoing fertility treatment, and several studies have linked deficiency to lower IVF success rates. While the evidence is not strong enough to say supplementation improves outcomes, maintaining adequate levels (above 30 ng/mL) is generally recommended. Most women in northern climates benefit from 1,000 to 2,000 IU daily.
Omega-3 Fatty Acids
Fish oil supplements show early promise for reducing inflammation and improving uterine blood flow, but the evidence base is still thin. If you do not eat fatty fish regularly, a supplement is reasonable but not a game-changer on its own.
What to Skip
DHEA is sometimes recommended for women with diminished ovarian reserve, but it should only be taken under medical supervision. Over-the-counter "fertility blends" marketed on social media are generally not supported by evidence and may contain ingredients that interfere with treatment.
What About Caffeine and Alcohol?
Moderate caffeine intake (under 200mg per day, roughly one cup of coffee) has not been consistently linked to reduced fertility in the research. You do not need to give up your morning coffee, though switching to one cup instead of three is a reasonable precaution.
Alcohol is more nuanced. Some studies suggest even moderate intake may reduce IVF success rates. Most reproductive endocrinologists recommend eliminating alcohol during active treatment cycles. Outside of treatment windows, moderate consumption is a personal choice.
The Bigger Picture
Nutrition matters, but it is one piece of a much larger puzzle. Sleep, stress management, exercise, and medical care all matter too. No single food or supplement will make or break your fertility.
The most evidence-based approach is simple: eat a Mediterranean-style diet rich in whole foods, take a quality prenatal vitamin with adequate folic acid, consider CoQ10 if you are over 35 and discuss it with your doctor, and do not let anyone convince you that a $90 powder from an influencer is the missing piece.
The Bottom Line
You do not need a perfect diet to conceive. You need a good-enough one, rooted in real food and real science, that supports your body while you navigate this journey.
Want personalized guidance on preparing your body and mind for fertility treatment? Book a session with me to talk through your plan.