If you've been Googling your symptoms at midnight, convinced something is off but not quite able to name it, you're not alone. And you're not imagining it.

PMOS (also known as PCOS, or polycystic ovary syndrome) is one of the most common hormonal conditions affecting women of reproductive age, yet up to 70% of cases go undiagnosed.¹ That's not because it's rare. It's because the signs are easy to dismiss, the testing isn't straightforward, and too many women are told their results are "normal" when they're anything but.

This guide is here to change that. We're going to walk through the key signs of PMOS (PCOS), honestly and clearly, so you can go into your next GP appointment informed and confident.

This isn't about self-diagnosing from a symptom checklist. It's about pattern recognition, learning what to look for, what questions to ask, and what a proper diagnostic workup actually involves, so you're not leaving appointments with more questions than you arrived with. Whether you're trying to conceive, managing your skin, or just tired of being told your bloods are "fine" while you feel anything but, this is the information your GP appointment should already have covered.

What Is PMOS (PCOS) and Why Is It So Hard to Spot?

PMOS (PCOS) is a hormonal condition that affects how the ovaries work, and it looks different in every woman, which is exactly why it takes an average of two years to diagnose.

PMOS (PCOS) is characterised by elevated androgen levels (often called "male" hormones, though every woman has them), disrupted ovulation, and in many cases, small fluid-filled follicles on the ovaries.

Here's what makes it tricky: PMOS (PCOS) doesn't look the same in every woman. Some women have irregular periods but no acne. Some have facial hair but regular cycles. Some have no outward symptoms at all and only discover their PMOS (PCOS) when investigating fertility. The condition sits on a spectrum, which is why so many women cycle through GPs without answers.

Your body is trying to tell you something. Learning to recognise what it's saying is the first step.

The Key Signs of PMOS (PCOS) to Know

What Are the Most Common Signs of PMOS (PCOS)?

The most common signs include irregular or absent periods, excess hair growth, acne along the jawline, hair thinning, weight gain around the abdomen, and polycystic ovaries on ultrasound. Not all signs appear in every person.

Below, we go deeper into each one.

1. Irregular or Absent Periods

Irregular periods are one of the most recognisable signs of PMOS (PCOS), though they're often dismissed as "just stress" or a natural variation.

Your cycle is considered irregular if it's consistently shorter than 21 days or longer than 35, if your period length varies significantly month to month, or if you're skipping periods altogether.

In PMOS (PCOS), this happens because elevated androgen levels disrupt ovulation. When the ovaries don't release an egg reliably, the hormonal cascade that triggers your period gets thrown off. Some women with PMOS (PCOS) experience notably infrequent periods (called oligomenorrhoea), while others stop altogether (amenorrhoea).

If you're tracking your cycle and noticing it's unpredictable, that data matters. Bring it to your appointment.

2. Hirsutism: Excess Hair Growth

Hirsutism, excess hair on the face, neck, chest, back, or stomach, is one of the most commonly reported signs of PMOS (PCOS) and is often described as one of the most emotionally distressing symptoms of the condition.²

It's driven by high androgen levels, particularly testosterone and DHEA-S, which stimulate hair follicles in androgen-sensitive areas of the body.

You might notice dark, coarse hairs on your chin, upper lip, or jawline, or finer hair appearing on your chest or stomach that wasn't there before.

This isn't a cosmetic issue. It's a physiological signal worth investigating. If you've been managing it quietly and hoping it goes away, it won't, without addressing the underlying hormones. And it can be addressed.

Hirsutism doesn't present the same way for everyone. How visible it is depends partly on ethnicity and individual hair growth patterns, which means some women with clinically significant androgen elevation see little visible hair change, while others notice it early. That variability is part of why hirsutism alone shouldn't be used to rule PMOS (PCOS) in or out. It's one data point, best read alongside your cycle history and blood work, not in isolation.

3. Acne That Doesn't Behave Like Normal Acne

Most of us have dealt with a breakout before a period. PMOS (PCOS)-related acne is different.

It tends to appear along the jawline, chin, and upper neck, classic androgen-driven territory. It's often cystic (deeper, more painful, slower to clear), and it can flare at any point in your cycle rather than following a predictable pattern.

High androgens trigger the sebaceous glands to produce excess oil, which blocks pores and leads to persistent breakouts that don't respond well to standard skincare alone.

If you've been through the usual topical treatments without lasting improvement, it's worth exploring whether hormones are the root issue, not just your cleanser.

A useful question to ask yourself: does the breakout pattern track your cycle, or does it seem to ignore it entirely? Cystic, jawline-heavy acne that flares regardless of where you are in your cycle, and that hasn't responded to a proper skincare routine over several months, is a reasonable prompt to raise hormones with your GP rather than trying yet another cleanser.

4. Polycystic Ovaries on Ultrasound

The name is a little misleading. "Polycystic" doesn't mean you have cysts. What it actually means is that your ovaries contain a higher-than-usual number of small, underdeveloped follicles, the fluid-filled sacs where eggs develop.

In a typical cycle, one dominant follicle matures and releases an egg at ovulation. In PMOS (PCOS), several follicles begin to develop but none reaches full maturity. They sit in the ovaries, creating that characteristic "string of pearls" appearance on ultrasound.

It's important to know that not everyone with PMOS (PCOS) has polycystic ovaries, and conversely, having polycystic-looking ovaries on ultrasound doesn't automatically mean a PMOS (PCOS) diagnosis. It's one piece of the picture, not the whole thing.

5. Hair Thinning or Loss on the Scalp

While PMOS (PCOS) drives excess hair growth in some places, it can cause thinning in another: your scalp.

Excess testosterone can be converted into a hormone called DHT (dihydrotestosterone), which miniaturises hair follicles over time. This leads to a pattern of thinning, often at the temples, the crown, or a widening part, known as female pattern hair loss.

You might notice more hair on your brush, or hair that appears fine, flat, and lacking its usual density.

This one is worth raising with your GP specifically, because it's sometimes overlooked during PMOS (PCOS) consultations yet it's a meaningful androgen marker.

6. Weight Gain, Particularly Around the Abdomen

A substantial proportion of women with PMOS (PCOS), though not all, are classified as overweight or obese under standard BMI criteria, with estimates varying widely by population studied.³ But here's the part that often gets missed: it's not a discipline problem.

Many women with PMOS (PCOS) have underlying insulin resistance, a condition where the body's cells don't respond efficiently to insulin. This causes the pancreas to produce more of it, and elevated insulin further stimulates androgen production. The result is a cycle of metabolic disruption that makes weight management genuinely harder, particularly around the abdomen.

If you've been eating well, exercising consistently, and still struggling to manage your weight, especially around your middle, this deserves investigation, not judgement. Insulin resistance is a physiological pattern, and it's one that responds well to targeted support.

7. Other Signs Worth Knowing

PMOS (PCOS) can show up in subtler ways too. Some women report:

• Fatigue and energy crashes, particularly after carbohydrate-heavy meals, linked to blood sugar dysregulation
• Mood changes including anxiety and low mood, which may relate to hormonal fluctuations and sleep disruption
• Difficulty sleeping, often tied to elevated cortisol or anxiety
• Skin darkening in folds like the neck, groin, or underarms (acanthosis nigricans), a sign of insulin resistance
• Fertility challenges, particularly irregular or absent ovulation making conception harder

These aren't guarantees of PMOS (PCOS), but in combination with other signs, they're worth flagging.

Why Getting Diagnosed Matters, Even If You're Not Trying to Conceive

PMOS (PCOS) is linked to a higher long-term risk of type 2 diabetes, cardiovascular disease, and endometrial changes, which is why a diagnosis matters even outside of fertility planning.

It's easy to assume PMOS (PCOS) is only relevant if you're actively trying to conceive, but the condition's reach extends well beyond reproductive health. Chronic insulin resistance, left unaddressed, raises the risk of developing type 2 diabetes over time.¹ The same metabolic disruption is linked to unfavourable cholesterol patterns and elevated cardiovascular risk, which is part of why long-term PMOS (PCOS) management is increasingly framed as whole-body health management, not just a fertility or skin issue.

There's also the endometrial side of things. When ovulation is infrequent or absent for extended stretches, the uterine lining can build up without the regular shedding a normal cycle provides, which over years may raise the risk of endometrial hyperplasia. This is one of the clearest reasons a diagnosis, and a management plan, matters regardless of where you are in your fertility journey.

None of this is designed to alarm you. It's designed to explain why "just live with it" was never good advice, and why getting a proper diagnosis, whatever your life stage or fertility plans, is worth the appointments, the blood draws, and the persistence it sometimes takes.

How Is PMOS (PCOS) Actually Diagnosed?

What Tests Are Used to Diagnose PMOS (PCOS)?

PMOS (PCOS) is diagnosed using the Rotterdam Criteria: a woman must meet at least two of three criteria, irregular or absent ovulation, elevated androgen levels, and polycystic-appearing ovaries on ultrasound. There is no single definitive test.

Here's what a typical diagnostic process looks like.

Step 1: Your medical history

Your GP will ask about your cycle history, symptoms, and any changes you've noticed. Be as specific as possible. Bring notes if it helps. The more detailed you are, the better equipped they are to investigate properly.

Step 2: Blood tests

These typically measure:

• LH and FSH (luteinising hormone and follicle-stimulating hormone), though the ratio between them is no longer considered a reliable diagnostic marker on its own
• Total and free testosterone
• DHEA-S (another androgen)
• Prolactin and thyroid hormones (to rule out other causes)
• Fasting insulin and glucose, to check for insulin resistance
• HbA1c, a longer-term blood sugar marker

Important note on timing: where possible, hormone blood tests are most informative when done in the early follicular phase (days 2 to 5 of your cycle). If you have irregular periods, your GP may advise testing at a specific point regardless.

Step 3: Pelvic ultrasound

An ultrasound can assess ovarian volume and follicle count. In PMOS (PCOS), this often shows 20 or more follicles per ovary, or increased ovarian volume. It can also rule out other causes of symptoms.

Step 4: Receiving your diagnosis

Using the Rotterdam Criteria, the internationally accepted standard, a PMOS (PCOS) diagnosis requires at least 2 of the following 3:

1. Irregular or absent periods (indicating disrupted ovulation)
2. Clinical or biochemical signs of elevated androgens
3. Polycystic ovaries on ultrasound

Rotterdam Criterion	What It Looks Like	How It's Assessed
Irregular or absent ovulation	Cycles under 21 or over 35 days, or missed periods	Cycle history, tracking data
Elevated androgens	Hirsutism, acne, hair thinning	Clinical exam and/or blood test
Polycystic ovaries	20+ follicles per ovary, or increased volume	Pelvic ultrasound

What to Do if You're Waiting for a Diagnosis

Track your cycle and symptoms, ask for the specific tests that are often left out of routine panels, and don't accept a "normal" result without seeing the actual numbers.

Getting a referral, waiting for an ultrasound, or navigating a GP who seems sceptical, it's frustrating. Here's what you can do in the meantime.

Track your cycle. Use an app or a simple notebook. Note cycle length, period heaviness, and any symptoms through the month. This data gives your GP something concrete to work with.

Track your symptoms. Acne patterns, energy levels, mood shifts, hair changes, write them down with dates. Over a few months, patterns emerge.

Request the right tests. You're entitled to ask your GP to include fasting insulin and DHEA-S alongside standard hormone panels. These are often omitted from routine testing but are highly relevant to PMOS (PCOS).

Don't accept "normal" without context. Reference ranges on blood tests are broad. A result that technically sits within the "normal" range can still be worth a second look for you specifically. Ask for the actual numbers, not just the verdict.

How Myoplus Can Support You on This Journey

Whether you're waiting on a diagnosis or you've already received one, there's a lot you can do to support your hormonal health in the meantime. One of the most researched starting points is myo-inositol.

Women with PMOS (PCOS) often have lower levels of inositol in the body, a naturally occurring compound that plays a role in insulin signalling and ovarian function. A 2024 systematic review and meta-analysis found the overall evidence for myo-inositol in PCOS to be limited and inconclusive, though it identified a potential benefit specifically for ovulation, with no meaningful difference compared with metformin in some measures.⁴ That's a more cautious conclusion than the supplement is often given credit for, and it's the honest starting point for what myo-inositol can and can't be expected to do.

Myoplus by MyOva is our supplement developed specifically for women with PMOS (PCOS). It contains myo-inositol alongside chromium picolinate (which contributes to normal macronutrient metabolism and to the maintenance of normal blood glucose levels), folate as L-5-methyltetrahydrofolate (the active, bioavailable form), and vitamin B6 (which contributes to the regulation of hormonal activity), a combination formulated to work with your body's physiology.

It's not a magic fix. But it gives your body what it's often missing, and for many women, that's exactly where meaningful change starts.

Frequently Asked Questions About PMOS (PCOS) Signs and Diagnosis

Can you have PMOS (PCOS) without irregular periods?

Yes. Some women with PMOS (PCOS) have regular cycles but still show elevated androgens and polycystic ovaries on ultrasound.

This is sometimes called "ovulatory PCOS." Regular periods don't automatically rule out the condition. If other signs are present, it's still worth investigating.

What's the difference between PMOS (PCOS) and polycystic ovaries?

Polycystic ovaries refer specifically to how the ovaries look on ultrasound. PMOS (PCOS) is a broader syndrome diagnosed when ovarian appearance is combined with other hormonal or cycle-related signs.

You can have polycystic-looking ovaries without having PMOS (PCOS).

How long does it take to get a PMOS (PCOS) diagnosis?

On average, it takes around two years from symptom onset to diagnosis, often longer.

This is partly due to the variability of symptoms and the number of conditions that need to be ruled out. Keeping detailed records of your symptoms and cycles can help speed up the process.

Can PMOS (PCOS) be confirmed by a blood test alone?

No. Blood tests are an important part of the diagnostic picture, but PMOS (PCOS) is diagnosed using a combination of clinical signs, hormone levels, and often an ultrasound.

No single test is definitive.

Does PMOS (PCOS) affect fertility?

PMOS (PCOS) is one of the most common causes of ovulatory infertility, but having PMOS (PCOS) does not mean you cannot conceive.

Many women with PMOS (PCOS) go on to have healthy pregnancies, particularly with appropriate support. Supporting ovulation through lifestyle, nutrition, and targeted supplementation is a meaningful first step.

Should I ask for a specific referral if I suspect PMOS (PCOS)?

If your GP can't confirm a diagnosis through standard testing, you can ask about a referral to a gynaecologist or an endocrinologist.

This is a reasonable next step if your symptoms are clear but initial testing was inconclusive, or if you're not getting answers at the GP level. You're allowed to advocate for a referral. Bringing your tracked symptoms and cycle data to that conversation makes the case for you.

Conclusion

PMOS (PCOS) is underdiagnosed, often misunderstood, and consistently undersupported by standard care pathways. But it's also one of the more responsive conditions when addressed properly, with the right information, the right tests, and the right approach. You're not overreacting. You're not being dramatic. If something feels off in your body, it deserves a proper look. Your diagnosis is a starting point, not a verdict.

Further Reading

• 6 of the Best Apps and Devices for Tracking Your Cycle and Ovulation With PCOS
• PCOS and Insulin Resistance: Understanding the Link and How to Support Hormonal Balance
• How to Advocate for Yourself When Diagnosed with PCOS

References

1. Boyle J, Teede HJ. Polycystic ovary syndrome: an update. Aust Fam Physician. 2012;41(10):752-756.
2. Lipton MG, Sherr L, Elford J, Rustin MHA, Clayton WJ. Women living with facial hair: the psychological and behavioral burden. J Psychosom Res. 2006;61(2):161-168. doi:10.1016/j.jpsychores.2006.01.016
3. Lim SS, Davies MJ, Norman RJ, Moran LJ. Overweight, obesity and central obesity in women with polycystic ovary syndrome: a systematic review and meta-analysis. Hum Reprod Update. 2012;18(6):618-637. doi:10.1093/humupd/dms030
4. Fitz V, Graca S, Mahalingaiah S, et al. Myo-inositol effectiveness in polycystic ovary syndrome: a systematic review and meta-analysis. J Clin Endocrinol Metab. 2024;109(6):1630-1655. doi:10.1210/clinem/dgad762
5. NHS. Polycystic ovary syndrome (PCOS): Diagnosis. nhs.uk. Accessed 2026.

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always speak with your GP or a qualified healthcare provider about your symptoms, particularly if you are pregnant, trying to conceive, or managing an existing health condition. Food supplements should not be used as a substitute for a varied and balanced diet.

References