You've been tracking cycles for months. You've read every forum thread about pineapple core and seed cycling, and your search history is a mix of "best prenatal vitamin" and "does coffee affect fertility." Meanwhile, every new piece of advice seems to contradict the last one.
This is the point where a lot of my clients find me. A fertility dietitian helps you sort through the noise and build a way of eating that supports your hormones, your cycle, and your body as it prepares for pregnancy, without turning food into another source of stress.
What Is a Fertility Dietitian?
A fertility dietitian is a registered dietitian (RD) with specialized training in reproductive health. We use nutrition science to support ovulation, egg and sperm quality, hormone balance, and a healthy pregnancy from the very start.
The credential matters here. "Nutritionist" isn't a protected title in most states, so anyone can use it. A registered dietitian has completed an accredited degree, a supervised clinical internship, and a national board exam, and keeps up with continuing education. Many fertility dietitians, myself included, also hold advanced degrees and additional training in hormone health.
A fertility dietitian works alongside your OB-GYN, reproductive endocrinologist (RE), or fertility clinic. We don't diagnose or replace medical treatment. We fill the gap that a 15-minute appointment usually can't: what to actually eat, which supplements are worth your money, and how to make it all fit into your real life.
Who Can Benefit From Working With a Fertility Dietitian?
Infertility affects roughly 1 in 6 people worldwide, according to the World Health Organization. You don't need a diagnosis to benefit from preconception nutrition support, though. I work with women and couples who are:
Trying to conceive for the first time and want to start with a strong nutritional foundation
Living with PCOS (or PMOS), where irregular ovulation and insulin resistance often play a role
Managing Hashimoto's or another thyroid condition, since thyroid function is closely tied to ovulation and early pregnancy
Preparing for IUI or IVF and wanting to support egg quality during the months before retrieval or transfer
Navigating unexplained infertility and looking for factors within their control
Coming off a GLP-1 medication before trying to conceive and wondering how to eat during that transition
Experiencing recurrent pregnancy loss, alongside medical evaluation and care
Supporting a male partner, because sperm health is half of the equation
What the Research Says About Food and Fertility
Nutrition research in fertility is still growing, and I'm careful not to overpromise. Food can't fix every fertility challenge. What the evidence does show is that overall eating patterns are associated with meaningful differences in ovulation and reproductive outcomes.
One of the best-known studies comes from the Nurses' Health Study II, which followed more than 17,000 women trying to conceive. Women whose diets included more plant protein, more monounsaturated fats, more fiber-rich carbohydrates, iron from plant foods, and a multivitamin had a significantly lower risk of ovulatory infertility.
Mediterranean-style eating patterns, rich in vegetables, fruit, whole grains, legumes, olive oil, nuts, and fish, have also been associated with better outcomes in some IVF studies. The research isn't perfectly consistent, and that's normal for nutrition science. The overall direction is encouraging and points toward variety and abundance rather than restriction.
Here's what that looks like on a plate:
Fiber-rich carbohydrates like beans, lentils, oats, berries, and whole grains, which support steady blood sugar and insulin levels
A mix of protein sources, including fish, eggs, poultry, Greek yogurt, beans, lentils, tofu, and nuts. Both animal and plant proteins have a place
Healthy fats from olive oil, avocado, nuts, seeds, and fatty fish like salmon and sardines
Plenty of color from vegetables and fruit, which provide antioxidants that help protect eggs and sperm from oxidative stress
Low-mercury seafood two to three times a week, following FDA guidance, for omega-3 fats
Key Nutrients for Fertility
A food-first approach comes first, and targeted supplements fill the gaps. These are the nutrients I look at most closely with clients trying to conceive:
Folate. Adequate folate before conception lowers the risk of neural tube defects. The CDC recommends 400 mcg of folic acid daily for anyone who could become pregnant, starting at least one month before conception. Some people prefer methylfolate, and we can talk through which form makes sense for you.
Iodine. Essential for thyroid hormone production and fetal brain development. The American Thyroid Association recommends a prenatal with 150 mcg of iodine, and many prenatals don't include it. This one matters even more if you have a thyroid condition, so coordinate with your provider.
Choline. Important for fetal brain development and often overlooked. Most prenatals contain little to none, and most women fall short. Eggs are one of the richest food sources.
Omega-3 fats (DHA and EPA). Support hormone signaling and healthy inflammation levels, and play a role in fetal brain and eye development later on.
Vitamin D. Low levels are common and have been linked to poorer reproductive outcomes in some studies. Testing with your provider is the best way to know whether you need to supplement and how much.
Iron and B12. Both support healthy blood and energy levels. Needs climb in pregnancy, so building up stores ahead of time helps. This is especially important if you eat little red meat or follow a mostly plant-based diet.
Supplements aren't one-size-fits-all. More isn't always better, and some fertility supplements marketed online have little evidence behind them. Part of my job is helping you spend money on the things that are actually supported by research and appropriate for your situation.
PCOS and Fertility Nutrition
PCOS is one of the most common causes of ovulatory infertility. Many people with PCOS have some degree of insulin resistance, which can disrupt ovulation and raise androgen levels.
Nutrition is one of the most effective tools for supporting insulin sensitivity, and you don't need to cut out carbs to see benefits. Pairing carbohydrates with protein, fat, and fiber, eating regularly throughout the day, and building meals around whole foods can help support more regular cycles. Some supplements, such as myo-inositol, have research supporting their use in PCOS, and we can review whether they fit your plan alongside any medications your doctor has prescribed.
Thyroid Health and Fertility
Thyroid hormones affect ovulation, cycle regularity, and the early weeks of pregnancy. If you have Hashimoto's or hypothyroidism, your provider will likely want your thyroid levels well-managed before and during pregnancy.
A fertility dietitian can help with the nutrition side: adequate iodine (without overdoing it), selenium from foods like Brazil nuts and seafood, iron and vitamin D status, and timing your thyroid medication around meals, coffee, and supplements so it absorbs well.
Fertility Nutrition for Men, Too
Male factor infertility contributes to roughly half of infertility cases, yet it's often left out of the conversation. Sperm take about three months to develop, which means changes made today can show up in a future semen analysis.
Nutrition for sperm health looks a lot like nutrition for egg health: a Mediterranean-style pattern, adequate zinc, selenium, folate, and omega-3s, plenty of antioxidant-rich produce, and limited alcohol. When couples make changes together, it's easier to stick with them, and both partners' health is supported.
What a Fertility Dietitian Won't Do
You won't get a rigid meal plan, a list of forbidden foods, or pressure to lose weight from me. Trying to conceive is already stressful, and food rules tend to add stress without adding results.
My approach is evidence-based, food-positive, and non-restrictive. I don't use weight or body size as a measure of health, and I won't make your fertility journey about the number on a scale. Instead, we focus on behaviors that support your hormones: eating enough, eating regularly, getting a variety of nutrients, sleeping, moving in ways you enjoy, and managing stress.
When it comes to coffee and alcohol, the guidance is reasonable rather than extreme. ACOG recommends keeping caffeine under 200 mg per day during pregnancy (about one 12-ounce coffee), and many fertility clinics suggest similar limits while trying to conceive. Since there's no known safe amount of alcohol during pregnancy, many couples choose to cut back or stop while trying.
What Working With Hormone RD Looks Like
At Hormone RD, I support women and couples through every stage of the fertility journey, from "we're thinking about it" to IVF prep and early pregnancy. Here's what to expect:
A comprehensive intro session. We review your health history, cycle patterns, labs, current eating habits, supplements, and any treatment plans from your medical team.
A personalized nutrition plan. You'll leave with practical, realistic recommendations built around the foods you already enjoy and the life you actually live.
Supplement guidance. We review what you're taking, what's worth keeping, and what's missing.
Ongoing follow-up support. Follow-up visits help us adjust as your needs change, whether you're starting a medicated cycle, preparing for a transfer, or celebrating a positive test.
Collaboration with your care team. With your permission, I can communicate with your OB-GYN, RE, or primary care provider so everyone is on the same page.
I see clients in person in Marietta, GA, and virtually through telehealth, including clients nationwide.
Frequently Asked Questions
Can a dietitian help me get pregnant? A dietitian can't guarantee pregnancy, and anyone who promises that should be a red flag. What a fertility dietitian can do is help you optimize the factors within your control, like nutrient status, blood sugar balance, and eating patterns, which research associates with healthier ovulation, egg and sperm quality, and pregnancy outcomes.
When should I see a fertility dietitian? Ideally three to six months before you start trying to conceive or begin fertility treatment, since eggs and sperm develop over about three months. It's never too late to start, though, and support is valuable at any point in the process.
What's the difference between a fertility dietitian and a fertility nutritionist? A registered dietitian has completed accredited education, supervised clinical training, and a national credentialing exam. "Nutritionist" isn't a regulated title in most states. If you're looking for evidence-based medical nutrition care, look for the RD or RDN credential.
Do I need to give up coffee, gluten, or dairy? For most people, no. Moderate caffeine is generally considered fine, and there's no evidence that cutting out gluten or dairy improves fertility unless you have celiac disease or a diagnosed allergy or intolerance. Some research has even associated full-fat dairy with a lower risk of ovulatory infertility.
Does insurance cover a fertility dietitian? It depends on your plan. [Kate: add current insurance status, e.g., in-network plans, plus superbills for out-of-network reimbursement.]
Ready to Get Started?
If you're trying to conceive and feel overwhelmed by conflicting advice, you don't have to figure it out alone. Book an intro appointment with me, and we'll build a nutrition plan that supports your hormones, your fertility, and your peace of mind.
Kate Morton, MS, RD, is a registered dietitian and the founder of Hormone RD, a nutrition practice in Marietta, GA specializing in PCOS, thyroid health, fertility, perimenopause, and GLP-1 support. She holds an MS in Human Clinical Nutrition, is certified in Integrative and Functional Nutrition, and hosts The Period Chats Podcast.
References
Chavarro JE, Rich-Edwards JW, Rosner BA, Willett WC. Diet and lifestyle in the prevention of ovulatory disorder infertility. Obstetrics & Gynecology. 2007;110(5):1050-1058.
Chavarro JE, Rich-Edwards JW, Rosner B, Willett WC. A prospective study of dairy foods intake and anovulatory infertility. Human Reproduction. 2007;22(5):1340-1347.
Gaskins AJ, Chavarro JE. Diet and fertility: a review. American Journal of Obstetrics and Gynecology. 2018;218(4):379-389.
World Health Organization. Infertility prevalence estimates, 1990-2021. 2023.
Centers for Disease Control and Prevention. Folic acid: recommendations.
Alexander EK, et al. 2017 Guidelines of the American Thyroid Association for the diagnosis and management of thyroid disease during pregnancy and the postpartum. Thyroid. 2017;27(3):315-389.
American College of Obstetricians and Gynecologists. Committee Opinion No. 462: Moderate caffeine consumption during pregnancy.
U.S. Food and Drug Administration. Advice about eating fish.
This article is for educational purposes only and isn't a substitute for individualized medical advice. Talk with your healthcare provider before starting any new supplement or making changes to your treatment plan.
