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What is PCOS? Symptoms, Causes, and Treatment Options

Dr. Emily Smith

Dr. Emily Smith

Gynecologist

February 1, 2026
What is PCOS? Symptoms, Causes, and Treatment Options

Polycystic Ovary Syndrome (PCOS) is a common hormonal disorder affecting reproductive-aged women. Characterized by the formation of numerous small cysts in the ovaries, it manifests with irregular periods, increased hair growth, acne, and weight gain.

Key Symptoms of PCOS

  • Irregular Periods: The most common symptom. Having fewer than 9 periods a year or none at all.
  • Androgen Excess: Increased male hormones leading to excess hair growth (hirsutism), severe acne, and male-pattern hair loss.
  • Polycystic Ovaries: Ultrasound appearance showing numerous follicles arranged like a string of pearls around the ovaries.

What Causes PCOS?

The exact cause of PCOS is unknown, but a combination of genetic factors and environmental influences plays a role. Insulin resistance and low-grade inflammation are key factors in PCOS development.

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