Pillar guide · UK
PCOS symptoms, and what sits behind them.
PCOS is the most common hormonal condition in women of reproductive age, and one of the most poorly explained. Most women are handed a diagnosis, a leaflet and the pill, with no account of the metabolic picture underneath.
The name is misleading.
The 'cysts' on an ultrasound are not cysts. They are ordinary follicles that have stalled part-way through development because ovulation is not completing reliably. You can have PCOS with normal-looking ovaries, and polycystic-appearing ovaries without PCOS.
What defines the condition is the combination: irregular ovulation, raised androgen activity, and the characteristic ovarian appearance - two of the three, with thyroid disease, high prolactin and adrenal causes excluded.
Insulin is usually part of the story.
Many women with PCOS have some degree of insulin resistance, independent of body weight. Higher circulating insulin drives the ovaries to produce more androgens, which in turn disrupts ovulation and produces the skin and hair changes.
That mechanism is why nutrition, resistance training and sleep have measurable effects here, and why metformin appears in treatment plans for some women. It is also why PCOS carries longer-term metabolic and cardiovascular considerations that deserve monitoring rather than a one-off appointment.
PCOS and fertility.
PCOS is a common cause of difficulty conceiving, but it is one of the more treatable ones. Ovulation induction with letrozole or clomifene is effective for many women, and cycle tracking gives a clearer picture than assumption.
Irregular cycles do not mean no cycles. Contraception is still relevant if pregnancy is not the goal.
What treatment looks like.
Treatment is symptom-led rather than curative: combined hormonal contraception for cycle regulation and androgen symptoms, anti-androgen options for hirsutism, metformin where insulin resistance is significant, and ovulation induction where pregnancy is the aim.
Alongside that sits the metabolic layer - protein and fibre-forward eating, resistance training, sleep and stress load - which is not a substitute for medical care but does change how well the rest of it works.
This page is information, not medical advice. Your plan should be shaped by a clinician who knows your history.
How PCOS presents
| Cluster | What women describe |
|---|---|
| Cycle | Fewer than nine periods a year, unpredictable cycles, or periods that stopped altogether. |
| Skin | Persistent adult acne along the jaw and chin, oily skin, dark velvety patches at the neck or underarms. |
| Hair | Coarse hair growth on the face, chest or abdomen, alongside thinning at the crown. |
| Metabolic | Weight that is difficult to shift, strong sugar cravings, energy crashes, raised blood glucose or lipids. |
| Fertility | Difficulty conceiving because ovulation is irregular or absent, and uncertainty about timing. |
| Mood | Higher rates of anxiety, low mood and body image distress, which are underestimated in most consultations. |
When to get help.
- You have fewer than nine periods a year, or your cycle has stopped.
- Acne or hair growth is changing quickly, which needs assessment.
- You have been trying to conceive for twelve months, or six months if you are over 35.
- You have a family history of type 2 diabetes and want metabolic screening.
Go deeper.
Short, specific reads for the question you actually came with.
PCOS symptom checklist
What to note before your appointment.
How PCOS is diagnosed in the UK
Rotterdam criteria, bloods and scans, plainly explained.
PCOS and insulin resistance
The mechanism that connects most of the symptoms.
PCOS and fertility
Ovulation induction, timing and what to expect.
Eating and training with PCOS
What the evidence supports, without the food rules.
Free · Clinician-designed · No sign-up
Not sure if Polycystic ovary syndrome is what you're facing?
Take our short check-in and we'll show you which pathway - and which specialist - fits you best. Your answers are processed in-session and never stored.
Common questions.
How is PCOS diagnosed in the UK?
Diagnosis uses the Rotterdam criteria: two of three features - irregular or absent ovulation, clinical or biochemical signs of raised androgens, and polycystic-appearing ovaries on ultrasound - once thyroid, prolactin and adrenal causes have been excluded.
Can you have PCOS with regular periods?
It is possible. If androgen symptoms and ovarian appearance are both present, the criteria can be met without cycle irregularity. Regular bleeding also does not guarantee that ovulation is happening every cycle.
Does PCOS always cause weight gain?
No. A significant proportion of women with PCOS are of normal weight, and insulin resistance can be present regardless of body size. Weight-focused advice alone misses those women.
Can PCOS be cured?
There is no cure, but symptoms are manageable and often improve substantially with treatment. Cycles, skin, fertility and metabolic markers can all be addressed, and the picture often changes across a lifetime.
Does PCOS mean I cannot get pregnant?
No. PCOS is a common cause of difficulty conceiving, and it is also one of the more treatable ones. Many women conceive with ovulation induction, and some conceive without intervention.
Related on Clarity Clinic
More across the site
Polycystic ovary syndrome is diagnosed in the UK using the Rotterdam criteria: two of irregular or absent ovulation, cli
perimenopause symptoms
£45 to £60 per hour • Remote (UK)
Clinician-designed check-ins, nothing stored.
pmdd
Clinician-designed ASRS-based screening, nothing stored.
nutritionist jobs uk
Curated multi-step plans.
Written by the Clarity Clinic editorial team. Information only, not medical advice. Last updated 27 August 2026.