What Are the Signs of PCOS?
Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on August 25th, 2026.
PCOS symptoms typically include irregular or missed periods, excess hair growth, and unexplained weight gain. Insulin resistance is common in PCOS and may contribute to weight-related concerns, although estimates vary and difficulty losing weight or increased hunger can have many causes. Common signs include acne that persists past teenage years, male-pattern baldness or hair thinning, and dark skin patches called acanthosis nigricans. Many women also struggle with mood changes, fatigue, and fertility issues. PCOS affects an estimated 6-12% of reproductive-age women. Because these symptoms can have other causes, a healthcare professional must evaluate them to diagnose PCOS and discuss appropriate management.
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