Nutrition for PCOS
and conception
A calorie and nutrient target built around ovulation support — not just weight loss. Includes key fertility nutrients, BMI context, and a PCOS-specific macro split.
Why nutrition matters differently for PCOS fertility
For most people, fertility nutrition advice focuses on a handful of key nutrients — folate, vitamin D, omega-3s. For people with PCOS, the picture is more complex: insulin resistance directly suppresses ovulation, elevated androgens disrupt the hormonal cascade required for a regular cycle, and body weight interacts with both in ways that affect fertility outcomes more strongly than in the general population.
This calculator addresses all three axes — calorie target, macro composition, and key fertility nutrients — in a PCOS-specific context. The goal is not just "eat healthy" but to understand the specific levers that affect ovulation and hormonal balance for PCOS, and to build a nutritional framework around them.
How much does weight affect PCOS fertility?
Research consistently shows that even modest weight loss — 5–10% of body weight — can restore ovulation in overweight people with PCOS. This effect is driven primarily by improved insulin sensitivity rather than weight per se. However, being underweight can equally suppress ovulation — the relationship is a U-curve, with a BMI roughly between 20 and 27 associated with the best fertility outcomes for most people with PCOS.
Should I lose weight before trying to conceive with PCOS?
This is a decision best made with your reproductive endocrinologist or OB-GYN. The general guidance: if your BMI is above 30, even a 5–10% weight reduction can meaningfully improve ovulation and reduce miscarriage risk, and may be recommended before fertility treatment. If your BMI is between 25 and 30, the decision is more nuanced and depends on your age, timeline, and other factors. This calculator provides nutritional context — it does not replace that clinical conversation.
Why is inositol highlighted specifically for PCOS fertility?
Myo-inositol (and its ratio with d-chiro-inositol) has the strongest evidence base of any supplement specifically for PCOS fertility. Multiple randomised controlled trials have shown improvements in ovulation rate, egg quality, and hormonal profiles in PCOS patients on inositol supplementation. It is not a drug and does not require a prescription, but dosing should still be discussed with your doctor, particularly if you are on metformin.
Is the macro split different for fertility than for weight loss?
Slightly — this calculator uses a protein-forward, moderate-fat split that prioritises anti-inflammatory fats (omega-3s, olive oil, avocado) over the standard weight-loss macro approach. Carbohydrates are limited based on insulin resistance level, but not aggressively restricted during fertility treatment since some research suggests very low-carbohydrate eating may affect LH pulsatility in some women. The goal is metabolic support without excessive restriction.
This calculator is an educational tool. It does not constitute medical advice, a fertility treatment plan, or a supplement prescription. Nutrient targets are general reference ranges — your individual needs may differ based on blood work, medications, and clinical history. Always discuss nutritional changes with your reproductive endocrinologist, OB-GYN, or a registered dietitian specialising in fertility before making significant dietary changes, especially if you are undergoing IVF or IUI.