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Polycystic ovary syndrome (PCOS) is a common hormonal (endocrine) condition that affects how the ovaries work in women and people assigned female at birth during their reproductive years. It is defined by a combination of irregular or absent ovulation, higher-than-typical levels of androgens ("male" hormones such as testosterone), and/or polycystic ovaries seen on ultrasound. Despite the name, the "cysts" are not true cysts but small, immature follicles that ring the ovary.
PCOS is the most common hormonal disorder among women of reproductive age. The World Health Organization estimates it affects about 10-13% of reproductive-aged women (other estimates put the range at roughly 8-13% depending on the diagnostic criteria used), and up to 70% of affected women worldwide do not know they have it. PCOS is also the most common cause of anovulation and a leading cause of infertility.
PCOS is a lifelong, manageable condition rather than a temporary illness. With diagnosis and care, most people can control symptoms, protect their fertility options, and reduce long-term health risks.
The exact cause of PCOS is not fully understood, but it appears to result from a mix of hormonal, genetic, and metabolic factors:
Excess weight is not required to have PCOS, and lean people can have it. However, carrying extra weight can worsen insulin resistance and symptoms.
Symptoms vary widely and may change over time. They often begin around the first menstrual period but can appear later. Common signs include:
PCOS is also linked to a higher risk of depression, anxiety, and reduced quality of life, so emotional well-being is an important part of care.
There is no single test for PCOS. Clinicians make the diagnosis after ruling out other conditions that can cause similar symptoms (such as thyroid disease, high prolactin, or congenital adrenal hyperplasia). Most current guidelines use the Rotterdam criteria, which require at least two of the following three features:
Evaluation typically includes a medical history and physical exam, blood tests (androgens, and tests to exclude other causes), and sometimes a pelvic ultrasound. Clinicians often also check blood sugar, insulin, and cholesterol because of the metabolic risks linked to PCOS.
Diagnostic criteria were developed for adults. Ultrasound is generally not used to diagnose PCOS in adolescents within about 8 years of the first period, since polycystic-appearing ovaries are common and normal in the years right after menarche.
Treatment is individualized based on your symptoms and whether you want to become pregnant. There is no cure, but symptoms and risks are often very manageable.
For many people, a healthy diet, regular physical activity, and—if appropriate—modest weight loss can improve insulin sensitivity, help regulate cycles, restore ovulation, and improve cholesterol. Lifestyle change is a foundational, first-line step.
For people trying to conceive, the 2023 International Evidence-based Guideline (ASRM/ESHRE/Monash) recommends letrozole as first-line to induce ovulation, with clomiphene as an alternative. Metformin, gonadotropins, and assisted reproduction may also be used.
GLP-1 receptor agonists (such as semaglutide) are being studied for weight and metabolic benefits in PCOS, but they are not FDA-approved specifically for PCOS and are not used during pregnancy.
PCOS raises the risk of several long-term conditions, making ongoing monitoring important. The CDC reports that more than half of women with PCOS develop type 2 diabetes by age 40. PCOS is also linked to higher risks of gestational diabetes, high blood pressure, unhealthy cholesterol, heart disease, sleep apnea, and endometrial (uterine lining) changes. Regular screening for blood sugar and cardiovascular risk factors is a key part of care.
Consider talking to a healthcare provider if you have irregular or missed periods, unexplained excess hair growth or acne, difficulty getting pregnant, or signs of insulin resistance such as darkened skin patches. Early evaluation can confirm the diagnosis, rule out other conditions, and start care that protects both fertility and long-term health.
*This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your individual situation.*
There is no single FDA-approved cure for PCOS; treatment is individualized to a person's main concern (cycle regulation, hair/acne, fertility, or metabolic risk). Combined estrogen-progestin oral contraceptives are a first-line option to regulate periods and lower androgens. Metformin (FDA-approved for type 2 diabetes, used off-label in PCOS) improves insulin sensitivity. Spironolactone is commonly prescribed off-label as an anti-androgen for hirsutism and acne; topical eflornithine (originally branded Vaniqa) is FDA-approved to slow facial hair growth in women. For fertility, the 2023 International Evidence-based Guideline (ASRM/ESHRE/Monash) recommends letrozole as first-line ovulation induction (used off-label for this purpose), with clomiphene as an alternative. GLP-1 receptor agonists (e.g., semaglutide) are being studied for weight and metabolic benefits in PCOS but are not FDA-approved specifically for PCOS. All medications carry risks and some are unsafe in pregnancy, so treatment choices should be made with a qualified clinician. This information is educational and is not medical advice.
This page is for general information and is not medical advice. Always consult a qualified clinician about diagnosis and treatment. Individual results vary.