Polycystic Ovary Syndrome (PCOS) is one of the most common hormonal disorders affecting women of reproductive age - yet it takes an average of 2 years and 3 doctors to receive a diagnosis. A large part of the problem is that PCOS looks different in every woman.

Here is a comprehensive checklist of the 12 most common PCOS symptoms, along with what each one means and when you should act.

What Is PCOS?

PCOS is a hormonal condition characterised by elevated androgens (male hormones), irregular ovulation, and - in some women - small cysts on the ovaries. It is diagnosed using the Rotterdam Criteria: you need at least 2 of the following 3 features:

Irregular or absent periods
Clinical or biochemical signs of excess androgens (testosterone)
Polycystic ovaries visible on ultrasound

The 12 Key PCOS Symptoms

1. Irregular Periods

Cycles that are consistently shorter than 21 days, longer than 35 days, or that simply come unpredictably are one of the hallmark signs of PCOS. This happens because irregular ovulation means the hormonal cycle that drives your period is disrupted.

2. Missed Periods (Oligomenorrhoea or Amenorrhoea)

Some women with PCOS have fewer than 8 periods per year (oligomenorrhoea) or none at all (amenorrhoea). This is not normal and should always be investigated.

3. Excess Facial or Body Hair (Hirsutism)

Dark, coarse hair growing on the upper lip, chin, chest, abdomen, or inner thighs is a direct result of elevated androgens. Around 70% of women with PCOS experience hirsutism.

4. Acne (Especially on the Jawline and Chin)

Androgen-driven acne in PCOS tends to be hormonal - appearing in the lower third of the face, jawline, and neck, and often worsening in the week before your period.

5. Thinning Scalp Hair (Androgenic Alopecia)

While body hair increases, scalp hair can thin - particularly at the crown and parting line - due to the same elevated androgens that drive hirsutism.

6. Weight Gain or Difficulty Losing Weight

Many women with PCOS have insulin resistance, which makes fat storage easier and weight loss harder - particularly around the abdomen. This is not a willpower issue.

7. Skin Tags

Small flaps of skin appearing on the neck, armpits, or groin are linked to insulin resistance, which is common in PCOS.

8. Dark Skin Patches (Acanthosis Nigricans)

Velvety, darkened patches of skin - typically found in the neck creases, armpits, and under the breasts - are another sign of insulin resistance.

9. Pelvic Pain

Chronic or intermittent lower abdominal pain unrelated to your period can occur in PCOS, though this should also be investigated for other conditions such as endometriosis.

10. Mood Changes, Anxiety, and Depression

Women with PCOS are significantly more likely to experience anxiety and depression. This is not purely psychological - it is partially driven by the hormonal imbalance and the chronic nature of the condition.

11. Difficulty Getting Pregnant

Because PCOS disrupts ovulation, it is the leading cause of anovulatory infertility. This does not mean pregnancy is impossible - with the right support, many women with PCOS conceive naturally or with minimal intervention.

12. Fatigue

Persistent, unexplained fatigue - even with sufficient sleep - is commonly reported by women with PCOS and is linked to insulin resistance affecting cellular energy production.

What to Do If You Recognise These Symptoms

Step 1: Start tracking your cycle meticulously. Document your period dates, flow, symptoms, moods, and any physical changes in a period tracking app. This data is invaluable when you see a doctor.

Step 2: Book an appointment with your GP. Ask for a blood panel including FSH, LH, testosterone, SHBG, fasting insulin, and AMH. Request a pelvic ultrasound.

Step 3: Do not self-diagnose. PCOS symptoms overlap with thyroid disorders, hyperprolactinaemia, and other conditions. A proper diagnosis requires blood tests.

PCOS is a manageable condition. The sooner it is identified, the sooner treatment - lifestyle, medication, or both - can begin.

Track your symptoms, cycle length, and hormonal patterns automatically with HerWell. Your logged data could be the key to your diagnosis.

PCOS Symptoms Checklist: 12 Signs You Might Have It