What it is. What's not. What we do.
PCOS affects roughly one in eight women. The 2023 international guideline updated the diagnostic criteria — for the first time, an AMH blood test can replace pelvic ultrasound in adult women.
This page walks you through the diagnosis, the tests we run to rule out other causes, and concrete steps for the symptoms that matter in your 20s and 30s.
Three criteria, two needed for diagnosis (in adults). The 2023 update lets us use AMH instead of ultrasound.
PCOS is a diagnosis of exclusion. Several other conditions cause irregular periods or hyperandrogenism and must be ruled out before the label is applied. These are the standard tests we run.
PCOS rarely shows up as one symptom — it shows up as a list of frustrations. Here's what each one is, and what the 2023 guideline recommends as first-line.
Without ovulation, the lining doesn't shed. Over years this raises endometrial risk.
In a typical cycle, the second half is dominated by progesterone, which thins the lining and triggers a bleed. In PCOS without ovulation, oestrogen builds the lining unopposed. Without a regular bleed at least four times a year, the lining can overgrow — eventually raising the risk of hyperplasia and (rarely) endometrial cancer.
Insulin resistance drives 50–70% of PCOS. Standard advice often fails.
In most women with PCOS, the body's cells respond poorly to insulin. The pancreas compensates by making more, and high insulin drives both fat storage and ovarian androgen production. Standard low-fat / calorie-restricted diets fail because they don't address the insulin signal.
Adult acne, often along the jawline. Standard topicals barely touch it.
Excess androgens stimulate sebaceous glands, especially along the jawline, chin, and neck. The acne pattern is hormonal — different from teenage forehead-and-cheek acne — and resists topicals alone.
Hirsutism — chin, upper lip, chest, abdomen. Slow to improve, but real progress in 6–12 months.
Androgens convert fine vellus hairs to thick terminal hairs in androgen-sensitive skin: chin, upper lip, sideburns, chest, abdomen, inner thighs. Each hair has a 6–12 month growth cycle, so medical treatment takes that long to show its full effect.
Dark, soft thickening at the back of the neck, underarms, groin. Skin telling you about insulin.
Acanthosis nigricans is a visible marker of insulin resistance. High circulating insulin binds skin growth-factor receptors, causing the skin to thicken and darken in body folds. It's not a skin disease — it's a window onto metabolism.
Female-pattern thinning at the crown. Treatable, but treatment is patient and slow.
Androgens shrink hair follicles in the scalp's central crown — the same hormones that grow hair on the chin thin it on the head. The widening of the centre part is the classic early sign.
3–4× higher risk of depression and anxiety than the general population. Real, not in your head.
The mental health burden in PCOS is real and biological — driven by insulin resistance, sleep disruption, the cumulative experience of acne and weight and unwanted hair, and direct hormonal effects on the brain. The 2023 guideline asks every clinician to screen for it. We do.
Anovulation is the barrier; egg quality is preserved. Letrozole is now first-line.
In PCOS, the ovary contains plenty of eggs — usually more than average — but ovulation doesn't happen on a regular schedule. The egg quality at any given retrieval is normal for age. Treatment is about getting reliable ovulation, not about fixing the eggs.
PCOS is not really about cysts. The name is a historical accident.
It's a syndrome — a cluster of three things that frequently appear together: irregular ovulation, signs of high androgens, and ovaries with many small follicles. The 'cysts' on ultrasound are not pathological cysts; they are arrested antral follicles, the building blocks of a normal cycle that didn't get chosen for ovulation.
The driver in 50–70% of cases is insulin resistance. High insulin keeps the ovaries producing too much androgen and disrupts the LH/FSH balance that triggers ovulation. The result is the cluster: anovulation, hyperandrogenism, and the metabolic risk that brings type 2 diabetes, fatty liver, and cardiovascular disease into the picture over decades.
So PCOS is two diagnoses in one: a reproductive condition (irregular cycles, fertility, androgens) and a metabolic condition (insulin, weight, long-term cardiovascular risk). Treatment that ignores either half misses the point.
A blood AMH ≥2.3 ng/mL (≥16 pmol/L) can substitute for ultrasound to diagnose polycystic ovarian morphology in adult women. Useful when ultrasound isn't available, when imaging is inconclusive, or when a transvaginal scan isn't appropriate.
Replacing decades of clomiphene as first-line ovulation induction. Higher live-birth rates, lower multiple-pregnancy risk. The Legro 2014 NEJM trial settled the question.
Every PCOS patient gets baseline fasting glucose / HbA1c, lipid panel, blood pressure — and repeats every 1–3 years. The metabolic risk is too important to leave to chance.
Myo-inositol with D-chiro-inositol (40:1 ratio) is now recognised as a reasonable adjunct or alternative to metformin for insulin sensitivity, especially in women who don't tolerate metformin.
Depression, anxiety, eating disorders, and reduced quality of life are now flagged as core features of PCOS, not side effects. Screening is required at diagnosis and at follow-up.
The genetic predisposition doesn't go away, but the symptoms can be controlled to a remarkable degree. Many women with mild PCOS who reach a healthy weight, exercise, and address insulin resistance see periods regularise on their own. Others need ongoing medication. After menopause, many of the reproductive symptoms quieten, though metabolic risk persists.
Yes — most women with PCOS can. The barrier is irregular ovulation, not poor egg quality. Letrozole induces ovulation in 80% of women within 6 cycles, and live-birth rates with first-line treatment are good. Weight optimisation alone restores spontaneous ovulation in many. IVF is rarely the first answer.
No. The pill masks PCOS by giving a regular bleed and treating acne / hirsutism, but it doesn't address the underlying insulin resistance. When you stop, symptoms return. The pill is excellent for symptom management when you don't currently want to conceive — just don't mistake it for a cure.
Yes. Metformin has been used in millions of patients with type 2 diabetes for decades. The main side effects are gastrointestinal (nausea, loose stools) which usually settle within weeks and improve with the extended-release formulation taken with food. Long-term use slightly lowers vitamin B12, so we check this annually.
PCOS does run in families, and daughters of women with PCOS have higher risk. But the 2023 guideline is firm: don't apply PCOS criteria within 8 years of menarche — adolescent cycles are normally irregular and adolescent ovaries normally have many follicles. If she has clear hirsutism, persistent acne, or absent periods for more than 3 months, that's worth investigating. Otherwise wait, and reassess at age 20+.
There's no single 'PCOS diet'. The 2023 guideline recommends a balanced, sustainable eating pattern that improves insulin sensitivity — Mediterranean-style or low-glycaemic-index work best in trials. Avoid quick-fix elimination diets that aren't sustainable. The eating pattern that you can stick to for 10 years matters more than the one that's optimal for 10 weeks.
The risk is elevated, not certain. About 25% of women with PCOS develop type 2 diabetes by age 40, compared to ~6% of women without. The single biggest predictor is weight: women who maintain a healthy weight reduce their lifetime diabetes risk substantially. Annual fasting glucose or HbA1c is part of standard PCOS care so we catch any drift early.
Laser permanently destroys hair follicles in its target zone, so existing hairs are removed for good. But the underlying androgen signal continues, so new follicles can be activated over time. The combination that works: medical anti-androgen therapy (slows new growth) plus laser (removes what's there) — together rather than separately.
A 30-minute first consultation. AMH, ultrasound, and the full exclusion bloods on the same visit. Your real numbers, your real plan. Consultations in English and Arabic.