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Published on: 8/18/2026

How many different types of PCOS are recognized, and what are they?

Yoshinori Abe

Reviewed by Yoshinori Abe, MD

Internal Medicine

Polycystic ovary syndrome (PCOS) is generally classified into four main types, each with distinct causes and symptoms:

  1. Insulin-resistant PCOS – The most common type, driven by high insulin levels that trigger excess androgen production.
  2. Inflammatory PCOS – Caused by chronic inflammation that disrupts ovulation and increases testosterone.
  3. Post-pill PCOS – Occurs temporarily after stopping hormonal birth control, leading to a surge in androgens.
  4. Adrenal PCOS – Stems from an abnormal stress response, resulting in elevated DHEA-S from the adrenal glands.

Identifying your specific PCOS type is key to effective treatment, since each responds to different lifestyle changes, medications, and therapies.

Because PCOS symptoms often overlap with other hormonal conditions, self-diagnosing can be tricky—and delaying answers can prolong discomfort. Taking a free, instant, online symptom check can help you clarify what's going on in minutes, match your symptoms to possible causes, and guide your next steps with confidence before your next doctor's visit.

Reviewed for medical accuracy: 07/14/2026

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Explanation

Polycystic Ovary Syndrome (PCOS) is a condition that affects how a woman's ovaries work. There are four main types of PCOS, each with its own causes and symptoms.

  1. Insulin-resistant PCOS: This is the most common type and is linked to high insulin levels. It can cause weight gain and dark patches on the skin.

  2. Inflammatory PCOS: This type is related to chronic inflammation, which can lead to fatigue, headaches, and skin issues like acne.

  3. Post-pill PCOS: Some women experience PCOS symptoms after stopping birth control pills. This type usually resolves on its own over time.

  4. Adrenal PCOS: This type is linked to an abnormal response from the adrenal glands, leading to an overproduction of certain hormones.

Understanding the type of PCOS is important for managing symptoms and finding the right treatment. If you're experiencing irregular periods, unexpected weight changes, or other concerning symptoms, take our free symptom checker to help identify potential causes. Each type requires a different approach, so it's important to work with healthcare providers to identify and manage the specific type of PCOS.

(References)

  • Azziz R. (2018). Polycystic Ovary Syndrome. Obstetrics and gynecology, 29995717.

  • Azziz R. (2016). Introduction: Determinants of polycystic ovary syndrome. Fertility and sterility, 27238627.

  • Waghmare SV, & Shanoo A. (2023). Polycystic Ovary Syndrome: A Literature Review With .... Cureus, 38021970.

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