What Is PCOS?
Polycystic Ovary Syndrome (PCOS) is a common hormonal disorder affecting 1 in 10 people with ovaries of reproductive age. It's one of the leading causes of irregular periods and infertility worldwide. Despite its name, you don't need to have cysts on your ovaries to be diagnosed with PCOS.
PCOS is characterized by a combination of hormonal imbalances — primarily elevated androgens (male hormones) and often insulin resistance — that disrupt the normal ovulation process.
PCOS Symptoms
PCOS presents differently in each person. Common symptoms include:
Menstrual Irregularities
- Infrequent periods (fewer than 8 per year)
- Prolonged cycles (35+ days)
- Absent periods (amenorrhea)
- Heavy or unpredictable bleeding
Androgen Excess Signs
- Hirsutism (excess hair on face, chest, back, or abdomen)
- Acne that is severe or persists after teenage years
- Androgenic alopecia (thinning hair or male-pattern hair loss)
Metabolic Symptoms
- Weight gain, especially around the abdomen
- Difficulty losing weight
- Skin tags
- Darkening of skin in skin folds (acanthosis nigricans) — a sign of insulin resistance
Ovarian Changes
- Polycystic-appearing ovaries on ultrasound (12+ follicles or enlarged ovary volume)
Diagnosis: The Rotterdam Criteria
PCOS is diagnosed when at least 2 of the following 3 criteria are met:
- Irregular or absent ovulation
- Signs of excess androgens (clinical or on bloodwork)
- Polycystic ovaries on ultrasound
Your doctor will also rule out other conditions that cause similar symptoms, such as thyroid disease, hyperprolactinemia, and congenital adrenal hyperplasia.
What Causes PCOS?
PCOS has no single cause. Research points to a combination of:
- Insulin resistance — Up to 70% of people with PCOS have insulin resistance. High insulin stimulates the ovaries to produce excess androgens.
- Hormonal dysregulation — An imbalance in LH/FSH ratio disrupts normal follicle development and ovulation.
- Genetics — PCOS runs in families; having a mother or sister with PCOS increases risk significantly.
- Inflammation — Low-grade chronic inflammation may stimulate excess androgen production.
PCOS and Fertility
PCOS is the most common cause of ovulatory infertility, but it does not mean you cannot get pregnant. Many people with PCOS conceive naturally. For those who need assistance, options include:
- Lifestyle modifications (even a 5–10% weight loss can restore ovulation)
- Ovulation induction with clomiphene or letrozole
- Metformin (improves insulin sensitivity)
- IVF for more complex cases
Evidence-Based PCOS Management
1. Lifestyle — First-Line Treatment
For people with PCOS who are overweight, even a 5–10% reduction in body weight can restore ovulation and significantly improve all symptoms. The approach:
- Low glycemic index (low-GI) diet
- Anti-inflammatory foods (Mediterranean diet pattern)
- Regular aerobic and resistance exercise
- Reducing ultra-processed foods and added sugars
- Adequate sleep (poor sleep worsens insulin resistance)
2. Medications
- Oral contraceptives — Regulate periods and reduce androgen levels
- Metformin — Improves insulin sensitivity, can restore ovulation
- Spironolactone — Blocks androgens; reduces hirsutism and acne
- Inositol supplements (Myo-inositol + D-chiro-inositol) — Emerging evidence supports benefits for insulin resistance and ovulation
3. Mental Health Support
PCOS significantly increases the risk of anxiety, depression, and disordered eating. Psychological support is a recognized component of comprehensive PCOS care.
How Cycle Tracking Helps With PCOS
Because PCOS often causes unpredictable cycles, consistent period tracking is especially important. Logging your cycles helps you:
- Identify any emerging patterns despite irregularity
- Monitor treatment response (e.g., whether medications are regularizing your cycle)
- Provide your doctor with objective data at appointments
- Detect potential ovulation windows
Frequently Asked Questions
Does PCOS go away after menopause?
The ovarian-related symptoms of PCOS (irregular periods, ovarian cysts) resolve after menopause when cycles cease. However, metabolic risks like insulin resistance, cardiovascular risk, and type 2 diabetes risk may persist and actually require more attention post-menopause.
Can a thin person have PCOS?
Yes. "Lean PCOS" affects approximately 20–30% of people diagnosed with PCOS. These individuals have all the hallmarks of PCOS (hormonal imbalances, irregular cycles, androgen excess) without being overweight, and may have different underlying mechanisms.
Is PCOS genetic?
PCOS has a strong hereditary component. If your mother, sister, or aunt has PCOS, you have a significantly higher risk. However, genetics is not destiny — lifestyle factors can substantially modify how PCOS manifests.