PCOS and Weight Loss: what helps

Key takeaways

• PCOS affects an estimated 10% to 13% of reproductive-age women, and up to 70% are undiagnosed.^[1]
• More than half of women with PCOS will have diabetes or prediabetes before age 40.^[2]
• The 2023 international guideline found no evidence that any one diet type is better than another for PCOS.^[3]
• Metformin and anti-androgens are used off-label; GLP-1 weight medicines could be considered for higher weight, with effective contraception when pregnancy is possible.^[3]
• Tirzepatide can reduce the effect of birth control pills: the label advises a non-oral or added barrier method for 4 weeks after starting and after each dose increase.^[6]

In short: Polycystic ovary syndrome (PCOS) is a common hormone condition that affects an estimated 10% to 13% of women of reproductive age, and up to 70% of them are not diagnosed. It is linked to insulin resistance, which can make weight harder to manage, and the U.S. Office on Women’s Health notes that more than half of women with PCOS will have diabetes or prediabetes before age 40. Even modest weight loss can help regulate periods and improve the chance of pregnancy, but the 2023 international guideline is clear that no single diet works better than another. Treatment is personal, so the right next step is an evaluation with a clinician who knows PCOS.

This page explains what PCOS is, how it is diagnosed, why it affects weight and what the evidence says about lifestyle, medicines and fertility. It is general information, not a diagnosis or a treatment plan. Please talk with a licensed clinician and get evaluated before starting or changing any treatment, especially if you might become pregnant.

PCOS basics

PCOS is a long-term condition involving the ovaries, hormones and metabolism. The World Health Organization (WHO) lists the common signs as irregular or absent periods, difficulty getting pregnant, excess facial and body hair, acne and thinning hair on the scalp; some women also have heavy or painful periods. The ovary finding that gives PCOS its name is seen on ultrasound (or, in adults, suggested by a raised AMH blood test). The WHO notes that no current treatment makes PCOS go away for good, but the symptoms and long-term risks can be managed.

The WHO lists the long-term health risks associated with PCOS as insulin resistance, type 2 diabetes, obesity, high blood pressure, high cholesterol, heart disease, sleep apnea and thickening or cancer of the lining of the womb (endometrial hyperplasia or cancer). It also highlights the emotional side: women with PCOS may experience anxiety, depression, eating disorders and negative body image, partly because of stigma around infertility, weight and hair growth. If that resonates, you are not alone, and mental health support is part of good PCOS care.

How PCOS is diagnosed

The 2023 International Evidence-based Guideline for the Assessment and Management of PCOS, developed by experts across six continents and published in several journals, sets out how clinicians diagnose it. In adults, PCOS is diagnosed when at least two of three features are present and other causes have been ruled out:

Two updates in the 2023 guideline matter for patients. First, a blood test for anti-Müllerian hormone (AMH) can now be used instead of an ultrasound to define polycystic ovaries in adults, but it should not be used as a single test and should not yet be used in adolescents. Second, ovary ultrasound is not recommended in adolescents, so in teenagers the diagnosis rests on irregular cycles (judged against wider cycle ranges in the first years after the first period) and signs of high androgens such as excess hair. The diagnosis belongs to a clinician who can examine you and order the right tests.

Screening the guideline recommends after diagnosis

• Blood sugar: the guideline names the 75-gram oral glucose tolerance test (OGTT) as the most accurate test of glucose status in PCOS. See our insulin resistance page for the ranges.
• Cholesterol: a lipid profile at diagnosis.
• Sleep apnea: ask about symptoms such as snoring and daytime sleepiness, then screen with validated tools if present. Read more in sleep apnea and weight.
• Mood and eating: screening for depression and anxiety in all adults and adolescents with PCOS, and considering eating disorders and disordered eating regardless of weight.

PCOS, insulin resistance and weight

The 2023 guideline describes insulin resistance as one of the underlying drivers of PCOS, and the NIDDK lists PCOS among the conditions that raise the risk of insulin resistance and prediabetes. The WHO lists obesity among the conditions associated with PCOS. Many women describe it as a frustrating loop: weight feels harder to manage, and extra weight seems to make symptoms stronger. You may read about “insulin tests for PCOS” online; the guideline says insulin assays are of limited clinical relevance and should not be used in routine care, so your clinician will usually check blood sugar instead.

The Office on Women’s Health says that losing 10% of body weight (15 pounds for someone who weighs 150 pounds) can help make menstrual cycles more regular and improve the chance of getting pregnant. The NIDDK makes a similar point for women with obesity generally: losing 5% of body weight may increase the chance of regular periods, ovulation and pregnancy. The 2023 guideline adds two important nuances. It encourages preventing further weight gain and improving waist size, not only the number on the scale, and it asks clinicians to be aware of weight stigma.

NIDDK (women with obesity, regular periods and ovulation)5% of body weight

Office on Women's Health (PCOS, more regular cycles and pregnancy chances)10% of body weight

Weight loss linked to better cycles and fertility, as described by U.S. health agencies

Item	Value
NIDDK (women with obesity, regular periods and ovulation)	5% of body weight
Office on Women's Health (PCOS, more regular cycles and pregnancy chances)	10% of body weight

Benefits described for groups, not a promise for any one person. NIDDK source: niddk.nih.gov, Health Risks of Overweight and Obesity.

Source: NIDDK Health Risks of Overweight and Obesity; Office on Women's Health, PCOS (checked on October 6, 2026)

What the evidence says about diet and exercise

Many PCOS diets are promoted online. The 2023 guideline reviewed the evidence and concluded that there is no evidence to support any one type of diet composition over another for weight, metabolic, hormonal, reproductive or psychological outcomes. In other words, low-carb, Mediterranean, plant-based and other balanced patterns can all work; the best one is the one you can keep up and that meets your nutrition needs. The guideline suggests a tailored energy deficit for women who want to lose weight.

• Food: start from a pattern you enjoy. Our diets hub compares the main options by evidence, effort and cost, including low-carb and Mediterranean. A registered dietitian can adapt one to your cycle, culture and budget.
• Activity: regular movement improves insulin sensitivity. Combining aerobic activity with strength training helps protect muscle.
• Sleep and stress: poor sleep and stress affect appetite and blood sugar; see our emotional eating guide if food and mood are tangled.

Medications discussed in PCOS care

Several medicines are used in PCOS, often off-label, meaning the FDA has not approved them specifically for PCOS. The Office on Women’s Health points out that metformin and anti-androgen medicines are not FDA approved for PCOS symptoms. That does not make them wrong choices, but it is a reason to ask about the evidence and the risks for you. Here is what the 2023 guideline says about each group, in general terms:

• Combined oral contraceptive pills could be recommended for adults with PCOS to manage excess hair and irregular cycles. They do not treat insulin resistance.
• Metformin alone should be considered in adults with PCOS and a BMI of 25 or more for weight, hormonal and metabolic outcomes. Stomach side effects are common, generally dose dependent and usually settle; long-term use may lower vitamin B12, so monitoring may be considered.
• Anti-androgens (for example spironolactone, used off-label) target hair growth and acne. The Office on Women’s Health warns they can cause problems in pregnancy, so reliable contraception is usually part of the plan.
• Weight-management medicines, including GLP-1 medicines, could be considered in addition to active lifestyle changes for adults with PCOS and higher weight, according to the guideline. It also says clinicians should make sure effective contraception is in place when pregnancy is possible, because pregnancy safety data are lacking. Wegovy and Zepbound are FDA approved for weight management in people who meet their labels, not for PCOS itself.
• Inositol (a supplement) could be considered based on personal preference, the guideline says, noting limited harm and possible metabolic improvement but limited clinical benefit. Supplements are not FDA approved to treat PCOS.

The guideline also says bariatric (metabolic) surgery could be considered for women with PCOS to improve weight, blood pressure and diabetes, with planning around pregnancy timing. Our bariatric surgery guide explains eligibility and recovery, and the GLP-1 vs bariatric surgery comparison lays out the trade-offs.

Fertility and pregnancy

The WHO lists infertility among the effects of PCOS, because ovulation may not happen regularly. Fertility treatment is available and the guideline emphasizes cheaper and safer options first. The 2023 guideline says letrozole should be the first-line medicine for ovulation induction in women with PCOS who are not ovulating and have no other infertility factors. The WHO and the Office on Women’s Health also mention clomiphene, in vitro fertilization (IVF) and, less often, ovarian surgery. These are specialist decisions, typically with a gynecologist or reproductive endocrinologist.

According to the Office on Women’s Health, women with PCOS have higher rates of miscarriage, gestational diabetes, preeclampsia and cesarean delivery. The guideline says an oral glucose tolerance test should be considered when planning pregnancy or seeking fertility treatment, offered at the first prenatal visit, and offered to all women with PCOS at 24 to 28 weeks of pregnancy. Review every medicine with your clinician when planning to conceive; the Wegovy and Zepbound labels say to stop the medicine when a pregnancy is recognized.

Living well with PCOS over the long term

Because PCOS raises the risk of type 2 diabetes, heart disease and endometrial problems, it is worth treating as a lifelong condition with regular check-ins, not a one-time fix. Practical habits that help: keep a simple record of your cycles, recheck blood sugar on the schedule your clinician sets, know your blood pressure and cholesterol, and raise any long gaps between periods. The guideline notes that premenopausal women with PCOS have a markedly higher risk of endometrial hyperplasia and endometrial cancer, although the overall chance of endometrial cancer is low. Our type 2 diabetes and weight page and the conditions hub cover the related conditions.

When to see a doctor

See a clinician if your periods are irregular or absent, if you have excess hair growth, severe acne or scalp hair thinning, if you have been trying to get pregnant for a while without success, or if you notice dark velvety skin patches. A primary care clinician or gynecologist is a common starting point; an endocrinologist may be involved for hormone and metabolic care. Get help promptly for very heavy bleeding, and reach out for mental health support if low mood, anxiety or disordered eating are affecting your life. Our find a provider guide explains the different specialists.

Cost and coverage

Costs vary widely: blood tests and ultrasound are usually billed as diagnostic care, birth control pills and metformin are generally lower-cost generics, and fertility treatment and brand-name weight medicines can be expensive. As of October 6, 2026, manufacturer self-pay prices were $349 a month for Wegovy pens (NovoCare Pharmacy) and $299 to $449 a month for Zepbound by dose (Lilly). Check your plan’s coverage before you start; our GLP-1 coverage guide explains prior authorization.

Overview

Polycystic ovary syndrome is a common, long-term hormone condition affecting about 10% to 13% of reproductive-age women, with up to 70% undiagnosed (WHO). It is diagnosed when two of three features are present (irregular cycles, high androgens, polycystic ovaries on ultrasound or raised AMH in adults) after other causes are excluded. It is linked to insulin resistance, type 2 diabetes, obesity, heart risk, sleep apnea and mood conditions; no current treatment ends it, but symptoms and risks can be managed.

Signs

• Irregular or absent periods
• Difficulty getting pregnant
• Excess facial or body hair (up to 70% of women with PCOS)
• Acne and thinning scalp hair
• Weight gain, especially around the waist; dark velvety skin patches
• Anxiety, depression or disordered eating

Tests a clinician may order

• Menstrual history (cycle length under 21 or over 35 days, or fewer than 8 a year)
• Blood tests for androgens; thyroid, prolactin and other hormones to rule out other causes
• Pelvic ultrasound, or AMH blood test in adults only (not as a single test)
• 75-gram oral glucose tolerance test, lipid profile
• Screening for sleep apnea symptoms, depression, anxiety and eating disorders

What lifestyle research shows

The 2023 international guideline found no evidence that any one diet composition is better than another for PCOS outcomes, and suggests a tailored energy deficit for weight loss, preventing further gain and improving waist size. The Office on Women's Health says losing 10% of body weight can help regulate cycles and improve pregnancy chances; the NIDDK says 5% weight loss may increase the chance of regular periods and ovulation in women with obesity.

Questions to ask your doctor or pharmacist

• Which tests do I need to confirm or rule out PCOS, and what should we check every year?
• Should I have an oral glucose tolerance test, and what were my cholesterol and blood pressure numbers?
• Which treatment fits my main goal right now: cycles, hair and skin, weight, or pregnancy?
• If a medicine is off-label for PCOS, what is the evidence and what are the risks for me?
• If I take a GLP-1 medicine, what contraception do I need and when should I stop before trying to conceive?
• Can you refer me to a dietitian or mental health professional who knows PCOS?

Frequently asked questions

Why is it so hard to lose weight with PCOS?

The 2023 guideline describes insulin resistance as one of the drivers of PCOS, and the WHO lists obesity among the conditions associated with it. That can make weight feel harder to manage. It is harder, not impossible: U.S. health agencies describe modest weight loss as improving cycles and ovulation, and a clinician can check blood sugar and other contributors.

What is the best diet for PCOS?

The 2023 international guideline found no evidence that any one diet composition is better than another. A balanced pattern you can keep, with a modest calorie deficit if weight loss is a goal, is the evidence-based approach. A registered dietitian can tailor it.

How much weight loss makes a difference?

The Office on Women's Health says losing 10% of body weight can help regulate cycles and improve pregnancy chances; the NIDDK says even 5% may improve periods and ovulation in women with obesity. Results vary.

Can I use Wegovy or Zepbound for PCOS?

They are FDA approved for weight management in people who meet their label criteria, not for PCOS itself. The 2023 guideline says weight-management medicines could be considered alongside lifestyle changes, with effective contraception when pregnancy is possible. Discuss benefits, risks and cost with your clinician.

Is metformin approved for PCOS?

No. Metformin is approved for type 2 diabetes; its use in PCOS is off-label. The guideline says it should be considered in adults with PCOS and a BMI of 25 or more. Stomach side effects and lower vitamin B12 are possible.

Can I get pregnant with PCOS?

PCOS can make it harder because ovulation may be irregular, and fertility treatment is available. The guideline names letrozole as the first-line medicine to induce ovulation when there are no other fertility factors; other options include clomiphene and IVF. A gynecologist or fertility specialist can advise.

Should I stop a GLP-1 before trying to conceive?

The Wegovy label advises stopping at least 2 months before a planned pregnancy. Plan any change with your prescriber, who can also discuss what to do about weight and blood sugar meanwhile.

Does inositol work for PCOS?

The 2023 guideline says inositol could be considered based on preference, with limited harm and possible metabolic improvement but limited clinical benefit. It is a supplement, not an FDA-approved treatment; tell your clinician if you take it.

Does PCOS ever go away?

The WHO says no current treatment makes PCOS go away for good, but its symptoms and long-term risks, such as type 2 diabetes, high blood pressure and heart disease, can be managed with lifestyle changes, medicines and regular check-ups.

References

1. Polycystic ovary syndrome (fact sheet). World Health Organization, 2026. (accessed October 6, 2026) Government page
2. Polycystic ovary syndrome. Office on Women's Health (HHS), 2025. (accessed October 6, 2026) Government page
3. Teede HJ, Tay CT, Laven JJE, et al.. Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Journal of Clinical Endocrinology and Metabolism, 2023. doi:10.1210/clinem/dgad463 · PMID 37580314 (accessed October 6, 2026) Guideline
4. Insulin Resistance and Prediabetes. National Institute of Diabetes and Digestive and Kidney Diseases (NIH). (accessed October 6, 2026) Government page
5. Health Risks of Overweight and Obesity. National Institute of Diabetes and Digestive and Kidney Diseases (NIH). (accessed October 6, 2026) Government page
6. ZEPBOUND (tirzepatide) injection: prescribing information. Eli Lilly and Company, via DailyMed, 2026. (accessed October 7, 2026) Drug label
7. MOUNJARO (tirzepatide) injection: prescribing information. Eli Lilly and Company, via DailyMed, 2026. (accessed October 7, 2026) Drug label
8. WEGOVY (semaglutide) injection and tablets: prescribing information. Novo Nordisk, via DailyMed, 2026. (accessed October 7, 2026) Drug label
9. Wegovy at NovoCare Pharmacy: self-pay prices. Novo Nordisk (NovoCare Pharmacy). (accessed October 7, 2026) Other
10. Zepbound coverage and savings. Eli Lilly and Company. (accessed October 6, 2026) Other

Facts checked on October 6, 2026

Educational information, not medical advice. Talk with a qualified healthcare professional about your own situation. In an emergency call 911.