PCOS Symptoms, Diagnosis & What It Means for You
Polycystic Ovary Syndrome affects up to 20% of Indian women of reproductive age, yet remains significantly underdiagnosed. Understanding the symptoms, how diagnosis is made, and what your specific "type" of PCOS means is the first step towards effective management.
What Is PCOS?
PCOS is a complex endocrine and metabolic disorder characterised by a combination of hormonal imbalances (particularly elevated androgens), ovulatory dysfunction, and often polycystic ovaries on ultrasound. It is not a single condition but rather a syndrome — a cluster of features that can present in different combinations.
PCOS Symptoms
Menstrual irregularity:
- Oligomenorrhoea: periods less than 8 times per year
- Amenorrhoea: no periods for >90 days
- Irregular cycles: significant variation month to month
- Some women with PCOS have regular cycles (ovulatory PCOS — Phenotype C)
Clinical signs of elevated androgens (hyperandrogenism):
- Hirsutism: Excess hair growth on face (upper lip, chin, sideburns), chest, abdomen, and back. Assessed using the Modified Ferriman-Gallwey (mFG) score — significant at ≥4 in South Asian women (per 2023 guideline ethnicity-specific cutoffs)
- Acne: Persistent adult acne, particularly on jawline, neck, and back — testosterone-driven
- Female pattern hair loss (FPHL): Thinning at the crown, widening of the central part (Ludwig Scale)
- Acanthosis nigricans: Dark, velvety skin thickening at the neck, armpits, or groin — a sign of insulin resistance
Other features:
- Weight gain or difficulty losing weight (particularly central/abdominal adiposity)
- Mood changes, anxiety, depression (prevalence 2–3× higher in PCOS)
- Sleep disturbances, fatigue
- Pelvic pain (in some patients with large or multiple follicular cysts)
How Is PCOS Diagnosed? The Rotterdam Criteria 2023
PCOS is diagnosed using the Rotterdam Consensus Criteria — updated in 2023. Diagnosis requires any 2 of the following 3 criteria:
1. Ovulatory Dysfunction Oligo-ovulation (≤8 cycles/year) or anovulation, or cycles consistently <21 or >35 days.
2. Clinical or Biochemical Hyperandrogenism Either clinical signs (hirsutism [mFG ≥4 in South Asian], acne, alopecia) OR elevated biochemical markers: elevated free testosterone, or elevated Free Androgen Index (FAI > 3.5–5).
2023 Update: Free testosterone is the preferred biochemical marker. Total testosterone alone is insufficient. AMH is elevated in PCOS but is NOT a diagnostic criterion per Rotterdam 2023.
3. Polycystic Ovarian Morphology (PCOM) on Ultrasound 2023 Update: The threshold was raised to ≥20 follicles per ovary (previously ≥12) to reflect improved ultrasound resolution. OR ovarian volume >10 mL. Transvaginal ultrasound (TVUS) is preferred; transabdominal is acceptable.
Exclusions: Other conditions causing similar symptoms must be excluded first: thyroid disorders, hyperprolactinaemia, congenital adrenal hyperplasia (CAH — check 17-OH progesterone), Cushing syndrome.
The Four PCOS Phenotypes
Rotterdam criteria generate four possible phenotypes with different severity and metabolic implications:
| Phenotype | Criteria | Characteristics |
|---|---|---|
| A (Classic — Full) | OD + HA + PCOM | Most severe; highest metabolic risk; most common |
| B (Classic — No PCOM) | OD + HA | Similar metabolic risk to A; no ultrasound criteria needed |
| C (Ovulatory PCOS) | HA + PCOM | Regular cycles; mildest biochemically; often missed |
| D (Non-Androgenic) | OD + PCOM | No hyperandrogenism; lower metabolic risk; may be an overlap with "mild PCOS" |
Phenotype A accounts for approximately 55–60% of PCOS diagnoses in India.
Required Investigations at Diagnosis
Hormonal panel:
- Day 2–3: FSH, LH (elevated LH:FSH ratio >2:1 supports PCOS but is no longer a diagnostic criterion)
- Free testosterone, SHBG, FAI
- AMH (elevated >3.5 ng/mL supports PCOS; does not diagnose)
- 17-OH Progesterone (to exclude CAH)
- TSH (thyroid), prolactin (to exclude other causes)
Metabolic screening (all PCOS patients):
- Fasting glucose and insulin (HOMA-IR for insulin resistance — >2.5 indicates IR)
- Fasting lipid panel (LDL, HDL, triglycerides)
- Blood pressure
Ultrasound:
- TVUS: antral follicle count (AFC), ovarian volume, endometrial thickness
Long-Term Health Implications of PCOS
PCOS is not just a fertility issue. Per the 2023 PCOS guideline, women with PCOS have elevated lifetime risks of:
- Type 2 diabetes: 5–10× higher lifetime risk
- Cardiovascular disease: elevated risk due to dyslipidaemia and hypertension
- Endometrial cancer: chronic anovulation without progesterone → endometrial hyperplasia
- Mental health conditions: anxiety, depression, eating disorders — warrant screening
Annual metabolic screening is recommended for all women with PCOS.
Reference: International Evidence-Based Guideline for PCOS, ASRM/ESHRE/NHMRC 2023. Rotterdam ESHRE/ASRM-Sponsored PCOS Consensus Workshop Group 2004 (updated 2023).
Frequently Asked Questions
Can you have PCOS with regular periods?▾
Yes. Phenotype C (ovulatory PCOS) is characterised by regular cycles combined with hyperandrogenism and polycystic ovaries on ultrasound — but without ovulatory dysfunction. This is the most commonly missed phenotype. Women with Phenotype C have fewer fertility problems but still have elevated androgen levels and metabolic risks that need monitoring.
What is the Rotterdam criteria for PCOS diagnosis?▾
Per Rotterdam 2023 criteria, PCOS requires any 2 of: (1) ovulatory dysfunction (irregular/absent cycles, <8 periods/year), (2) clinical hyperandrogenism (hirsutism, acne, alopecia) or biochemical hyperandrogenism (elevated free testosterone or FAI), or (3) polycystic ovarian morphology on ultrasound (≥20 follicles per ovary or ovarian volume >10 mL). Other causes must be excluded.
Is PCOS curable?▾
PCOS is not curable but is very manageable. Symptoms can be effectively controlled with lifestyle changes (diet, exercise, weight management), medications (metformin for insulin resistance, OCP for androgen suppression, letrozole for ovulation induction), and for fertility specifically — IVF when needed. Many women with PCOS live healthy, symptom-free lives with appropriate management.
Does PCOS cause weight gain?▾
PCOS and obesity have a bidirectional relationship. PCOS-associated insulin resistance promotes fat storage, particularly abdominal fat, making weight management harder. However, not all women with PCOS are overweight — lean PCOS (normal BMI with PCOS features) affects approximately 20–30% of PCOS patients, particularly in Asian populations.