What to Eat for PCOS When Trying to Get Pregnant: A Dietitian’s Guide

If you have polycystic ovary syndrome, or PCOS, and are trying to get pregnant, the best nutrition plan is usually not a highly restrictive fertility diet. A practical approach focuses on regular, balanced meals; adequate protein and fiber; nutrient-dense carbohydrates; unsaturated fats; and enough folate and other nutrients to support preconception health. Nutrition cannot guarantee ovulation or pregnancy, but it can support blood sugar regulation, cardiovascular health, weight stability, nutrient status and overall well-being while you pursue medical fertility care.

The 2023 international PCOS guideline does not identify one specific diet composition as superior for reproductive, hormonal or metabolic outcomes. That means you do not need to follow a mandatory low-carbohydrate, ketogenic, dairy-free, gluten-free or “PCOS fertility” diet unless it fits your medical needs and preferences. A sustainable plan is generally more useful than a short-term elimination diet. For background, see NutriGreene’s guide to PCOS nutrition and hormones.

Build balanced meals instead of chasing a perfect PCOS diet

A balanced meal can help provide steady energy and make it easier to meet nutrient needs. Try combining four components when possible: a protein food, a high-fiber carbohydrate, vegetables or fruit, and a source of unsaturated fat. For example, you might choose Greek yogurt with berries, oats and walnuts; a bean-and-grain bowl with vegetables and avocado; or salmon with potatoes and roasted vegetables.

Protein foods may include eggs, poultry, fish, Greek yogurt, cottage cheese, tofu, tempeh, beans, lentils and nuts. Fiber-rich carbohydrate choices include oats, quinoa, brown rice, potatoes, beans, lentils, whole-grain bread, fruit and vegetables. These foods can be included in different combinations depending on your culture, budget, cooking time, appetite and digestive tolerance.

Choose carbohydrates strategically, not fearfully

PCOS is often associated with insulin resistance, but avoiding all carbohydrates is not necessary for everyone. Carbohydrates provide energy and contribute important nutrients, especially when they come from fruit, vegetables, legumes, whole grains and dairy or fortified alternatives. Pairing carbohydrate foods with protein, fiber or fat may help meals feel more satisfying and may reduce rapid changes in blood glucose for some people.

A simple starting point is to avoid eating carbohydrates by themselves most of the time. Instead of having only crackers, for example, add hummus or cheese. Instead of drinking juice alone, choose whole fruit with yogurt or nuts. These are general strategies, not rigid rules, and people with diabetes or significant blood sugar concerns may need more individualized guidance.

Include nutrients that matter before pregnancy

Preconception nutrition is about more than fertility. It is also about preparing for the nutrient demands of pregnancy and correcting gaps before conception when possible. Common areas to review include folate, iron, vitamin B12, vitamin D, iodine, choline, calcium, omega-3 fats and overall protein intake. Your needs may differ based on your dietary pattern, laboratory results, medications, digestive health and medical history.

The American College of Obstetricians and Gynecologists recommends a prenatal vitamin containing at least 400 micrograms of folic acid beginning at least one month before pregnancy when possible and during the first 12 weeks of pregnancy. Some people need a different amount based on their health history, so discuss the appropriate supplement with your obstetric clinician rather than increasing the dose on your own. NutriGreene’s broader perinatal nutrition guide also reviews nutrition from conception through postpartum.

Do you need to lose weight before trying to conceive?

Weight can affect ovulation, fertility treatment outcomes and pregnancy risks, and the PCOS guideline recommends considering weight, blood pressure, nutrition, physical activity, sleep and other preconception factors. However, fertility care should not be reduced to a number on the scale. Aggressive dieting, repeated weight cycling and inadequate intake can worsen stress and make it harder to meet nutrient needs.

If weight management is one of your goals, a registered dietitian can help you choose an approach that protects energy, nutrition and your relationship with food. Depending on your circumstances, the goal may be weight stability, gradual change, improved meal consistency, better blood sugar patterns or simply correcting nutritional deficiencies. Progress can be measured in more ways than body weight.

Foods and supplements to be cautious about

Be cautious with supplements marketed as fertility boosters, hormone balancers or PCOS cures. Inositol, vitamin D, omega-3 supplements and other products have been studied in PCOS, but evidence varies by product, dose, outcome and patient group. A supplement that appears promising for one laboratory marker may not improve ovulation or live birth rates. Supplements can also interact with medications or provide excessive amounts of certain nutrients.

You generally do not need to eliminate gluten or dairy solely because you have PCOS. Avoiding these foods may be appropriate for diagnosed celiac disease, lactose intolerance, milk allergy or another specific reason, but unnecessary restriction can make it harder to obtain calcium, vitamin D, iodine, protein and other nutrients. Your prenatal supplement, medication list and any planned fertility treatment should be reviewed with your healthcare team.

A realistic day of eating for PCOS preconception nutrition

A sample day might include an egg-and-vegetable breakfast with whole-grain toast; a lunch of lentil soup with a side salad and yogurt; fruit with nuts or cheese for a snack; and a dinner of chicken, tofu or fish with brown rice or potatoes and vegetables. This is only an example. Someone who is vegetarian, vegan, managing food allergies, experiencing nausea or constipation, or preparing for fertility treatment may need a different structure.

The most useful plan is one you can follow consistently while meeting your nutrient needs. A dietitian can help adjust meal timing, portions, supplements, protein sources and carbohydrate choices without turning conception into a list of forbidden foods. NutriGreene offers personalized nutrition counseling to help people with PCOS connect evidence-based recommendations with their symptoms, lifestyle and reproductive goals.

When to involve your healthcare team

Consider preconception counseling if you have PCOS and are planning pregnancy, especially if your menstrual cycles are very irregular, you have diabetes or high blood pressure, you take medications that may not be appropriate during pregnancy, you have a history of nutrient deficiency, or you are preparing for fertility treatment. Your obstetric clinician or fertility specialist can address ovulation and medication needs, while a registered dietitian can help translate your health goals into practical meals and routines.

PCOS nutrition for fertility does not require perfection. Start with regular meals, include protein and fiber, choose mostly nutrient-dense foods, take the prenatal supplement recommended for you, and avoid unnecessary restrictions. The right plan should support both reproductive health and your long-term relationship with food.

Sources

1. Recommendations from the 2023 International Evidence-Based Guideline for the Assessment and Management of Polycystic Ovary Syndrome — https://prod.asrm.org/practice-guidance/practice-committee-documents/recommendations-from-the-2023-international-evidence-based-guideline-for-the-assessment-and-management-of-polycystic-ovary-syndrome/

2. Recommendations from the 2023 International Evidence-Based Guideline for the Assessment and Management of Polycystic Ovary Syndrome — https://doi.org/10.1016/j.fertnstert.2023.07.025

3. Good Health Before Pregnancy: Prepregnancy Care — https://www.acog.org/womens-health/faqs/good-health-before-pregnancy-prepregnancy-care

4. Dietary Supplements and Life Stages: Pregnancy — https://ods.od.nih.gov/factsheets/Pregnancy-HealthProfessional/

5. The Influence of Dietary Patterns on Polycystic Ovary Syndrome Management in Women: A Review of Randomized Controlled Trials With and Without an Isocaloric Dietary Design — https://pubmed.ncbi.nlm.nih.gov/40005001/

6. Nutrition Interventions in Women With Polycystic Ovary Syndrome: A Systematic Review — https://pmc.ncbi.nlm.nih.gov/articles/PMC13314694/

Educational disclaimer: This article is for general education and is not medical nutrition therapy or a substitute for individualized advice from a qualified healthcare professional.