I sat in my GP's office holding a piece of paper that said my hormones were "within normal range." I also had irregular cycles, acne along my jawline, hair thinning at my temples, and had been told for three years that I was "probably just stressed." The blood test wasn't wrong. It was just incomplete.

This is the story I hear from women in the MyOva community more than almost any other. You ask for "hormone tests," you get a handful of numbers back, and nobody explains what they actually mean for PMOS (also known as PCOS, or polycystic ovary syndrome) or whether you were even tested for the right things in the first place. Your diagnosis is a starting point, not a verdict, and the tests behind it deserve the same scrutiny.

This guide walks through exactly which blood tests matter for PMOS (PCOS), why standard panels so often miss it, how to actually get tested (on the NHS and privately), and what to do once the results land in your inbox.

None of this is about replacing your doctor or self-diagnosing from a spreadsheet. It's about walking into your next appointment knowing what to ask for, so the burden of catching what standard panels miss doesn't sit entirely on you after the fact.

Why Do Standard Blood Tests Miss PMOS (PCOS)?

Standard panels usually check thyroid and basic hormones, but skip insulin, free androgens, and AMH, the markers most specific to PMOS (PCOS).

A "routine" blood test is built to rule out the most common, most urgent problems first. That means thyroid function, sometimes a basic full blood count, and occasionally a single testosterone reading if you specifically mention symptoms. It is not built to investigate a condition with as many overlapping presentations as PMOS (PCOS).

Hormonal literacy isn't complicated, it's just rarely taught, and that includes to the clinicians running the first round of tests. PMOS (PCOS) sits at the intersection of your reproductive hormones, your metabolic health, and sometimes your thyroid, which means a genuinely useful workup has to pull from all three categories, not just one.

There's also a structural reason so many women get an incomplete panel: a standard blood test is designed to be cheap and fast to run across an entire population, not tailored to a specific suspected condition. Getting the fuller picture usually means asking for it by name, which is exactly what the next section is for.

What Blood Tests Should I Ask For With PMOS (PCOS)?

Ask for fasting insulin and glucose, free and total testosterone, SHBG, DHEAS, TSH, LH and FSH, and AMH, then read them together, not in isolation.

No single test diagnoses PMOS (PCOS). The Rotterdam criteria, the diagnostic framework most UK and international clinicians use, require at least two of three features: irregular or absent ovulation, clinical or biochemical signs of excess androgens, and polycystic-appearing ovaries on ultrasound. Blood tests feed directly into the second of those three, and they also rule out other conditions that can mimic PMOS (PCOS), like thyroid disease.

1. Insulin and Metabolic Markers

Insulin resistance is one of the most under-tested pieces of the PMOS (PCOS) puzzle, and one of the most consequential. A 2025 review in Frontiers in Endocrinology puts the prevalence of insulin resistance among women with PCOS at roughly 35% to 80%, a wide range that reflects differences in body weight, ethnicity, and how insulin resistance is measured, but the headline is the same either way: this is common, and it is not limited to women in larger bodies.¹ Insulin resistance can quietly drive irregular cycles, acne, and weight gain, which is exactly why it needs to be tested directly rather than assumed from appearance.

Ask for a fasting insulin alongside a fasting glucose or HbA1c. Fasting insulin on its own is a useful marker, but interpreting it against a fixed number is genuinely unhelpful, because normal ranges vary meaningfully between labs and assay types. What matters more is the pattern: a fasting insulin at the higher end of your lab's own reference range, paired with PMOS (PCOS) symptoms, is worth a conversation with your doctor even if it technically falls "within range."

2. Androgens (the Hormones Behind Acne, Hair, and Cycles)

Elevated androgens, often called hyperandrogenism, affect an estimated 60% to 80% of women with PMOS (PCOS), according to a 2023 review in Frontiers in Endocrinology, making it one of the most consistent features of the condition.² This is the hormone family behind jawline acne, excess facial or body hair growth, and scalp hair thinning.

Ask for free testosterone, total testosterone, and SHBG (sex hormone-binding globulin) together, since free testosterone is calculated from the other two and is often more clinically meaningful than total testosterone alone. DHEAS, an androgen produced mainly by the adrenal glands rather than the ovaries, is also worth requesting, particularly if your symptoms came on quickly or don't fit the typical PMOS (PCOS) pattern.

Remember that the Rotterdam criteria accept either clinical or biochemical signs of excess androgens, not blood results alone. A visible pattern of jawline or chest hair growth, persistent hormonal acne along the jaw and chin, or scalp thinning at the temples can count as evidence even when a testosterone reading lands inside the "normal" range. Some clinicians use a scoring tool called the Ferriman-Gallwey scale to assess hair growth patterns objectively. If your bloods look unremarkable but your symptoms are clearly androgen-driven, say so directly and ask for that to be documented as a clinical sign, not dismissed because a single number didn't confirm it.

3. Thyroid Function

Thyroid disease can cause irregular cycles, fatigue, and weight changes that overlap heavily with PMOS (PCOS) symptoms, which is exactly why TSH (thyroid-stimulating hormone) should always be part of the workup, if only to rule thyroid disease out.

You may come across older advice recommending a TSH target below 2.5 mIU/L for anyone trying to conceive. That guidance has moved on. The American Society for Reproductive Medicine's 2024 guideline found that a TSH between 2.5 and 4.0 mIU/L is not associated with a higher risk of miscarriage, and recommends using your own lab's reference range rather than a blanket 2.5 cutoff, alongside advising against routine treatment for mild, symptom-free TSH elevations.³ If your TSH comes back "a little high" but still within your lab's normal range, that is a conversation to have with your doctor, not necessarily a red flag on its own.

4. Reproductive Hormones (LH and FSH)

You'll often see an elevated LH to FSH ratio, sometimes framed as anything above 2:1, described as a hallmark of PMOS (PCOS). It's worth knowing that this idea is older than the research now backing it up. A 2026 study in Clinical Endocrinology reassessed this ratio in over 300 women with PCOS and found only around 18% actually had a ratio above 2:1, concluding the marker reflects a specific hormonal subtype rather than PMOS (PCOS) as a whole, and noting it isn't part of current diagnostic criteria.⁴ In plain terms, a normal LH:FSH ratio does not rule PMOS (PCOS) out, and an elevated one doesn't confirm it either. Ask for both LH and FSH anyway, because they're useful alongside your other results, just don't let this particular ratio carry more weight than it should.

5. AMH (Anti-Mullerian Hormone)

AMH reflects your ovarian reserve, but in PMOS (PCOS) it tends to run higher than average because of the larger number of small follicles typically present in polycystic ovaries. Some clinicians now use a high AMH reading, alongside symptoms, as a supporting marker for PMOS (PCOS), even before or alongside an ultrasound. It is not currently an official Rotterdam criterion, but it's a helpful piece of the picture, and increasingly a standard part of the workup.

At a Glance: Your PMOS (PCOS) Blood Test Summary

Test	Why It Matters	NHS or Private?
Fasting Insulin	Flags insulin resistance, common in PMOS (PCOS)	Usually private
HbA1c / Fasting Glucose	Checks longer-term blood sugar control	NHS or private
Free Testosterone	Key androgen behind acne, hair loss, hirsutism	NHS or private
SHBG	Needed to calculate free testosterone accurately	NHS or private
DHEAS	Adrenal androgen, useful if symptoms are atypical	Usually private
TSH	Rules out thyroid disease as the real cause	NHS or private
LH / FSH	Supports the picture, though the ratio is less definitive than once thought	NHS or private
Progesterone (Day 21 or mid-luteal)	Confirms whether ovulation actually happened	NHS or private
AMH	Often elevated in PMOS (PCOS), reflects ovarian reserve	Usually private
Prolactin	Rules out a separate cause of irregular cycles	NHS or private

What Does "Normal Range" Actually Mean?

A "normal" result means you fall within your lab's statistical range, not that PMOS (PCOS) has been ruled out.

This is the part nobody explains, and it's the reason so many women walk away from a normal blood test still feeling dismissed. Reference ranges are built from a wide population, often including people who have their own undiagnosed hormonal issues. Falling inside that range doesn't mean your levels are optimal for you, and it definitely doesn't mean your symptoms aren't real.

Your body is trying to tell you something even when a single number looks fine. Context matters more than any one result: your cycle length, your symptoms, your family history, and the pattern across multiple tests together tell a more accurate story than any single line on a lab report.

Here's a concrete way to picture it. Two different labs can list two different "normal" ranges for the exact same hormone, because each lab calibrates its range from its own local population and equipment. That means a fasting insulin flagged as borderline-high at one lab could sit comfortably mid-range at another, without your actual biology changing at all. This is exactly why repeating tests at the same lab over time, rather than comparing one-off results across different providers, gives you a far more reliable picture of what's actually happening.

How Do I Actually Get These Tests?

At Your GP or Doctor's Appointment

You are allowed to ask for specific tests by name. Write your list down before the appointment (the table above is a good starting point), mention your symptoms clearly, and if a test is declined, ask why and what the alternative plan is. You're not imagining it if you feel like you have to push harder than expected. Many women do.

Fasting tests (insulin, glucose) need to be booked as fasting bloods specifically, so double-check this when you book. Hormone tests like LH, FSH, and progesterone are often day-specific, so ask your GP or the phlebotomy team which day of your cycle to book for, particularly if your cycles are irregular.

If you're not sure how to phrase the ask, something like this works well: "I've had irregular cycles and acne for a while now, and I'd like to be tested for PMOS (PCOS), including fasting insulin, free testosterone, SHBG, and AMH, alongside the usual thyroid check." Naming the tests specifically, rather than asking generally for "a hormone check," makes it much harder for the request to get simplified down to a single testosterone reading.

Private Testing Options

If your GP can't offer the full panel, private testing (via a phlebotomy clinic or an at-home finger-prick kit) can fill the gaps, particularly for fasting insulin, DHEAS, and AMH, which are the tests most commonly left off NHS panels. Private testing isn't required to get a PMOS (PCOS) diagnosis, but it can speed up an otherwise slow process, and it puts the choice of which tests to run back in your hands.

Costs vary widely depending on the provider and how many markers you bundle together, so it's worth comparing a standalone fasting insulin test against a fuller PMOS (PCOS)-focused panel before booking, since bundled panels are often better value than testing each marker separately. Whichever provider you choose, check that the lab is UKAS-accredited (or the equivalent in your country), and take your results back to your GP afterward so they end up in your medical record and feed into an actual diagnosis or care plan, rather than sitting in a private portal on their own.

What Should I Do With My Results?

Bring your full results to a follow-up appointment, ask how they fit the Rotterdam criteria, and request a clear next step, not just a filed report.

Results in isolation are only half the job. Book a follow-up specifically to discuss them (don't let them sit in an online portal unexplained), and ask your clinician how your numbers relate to the Rotterdam criteria if a PMOS (PCOS) diagnosis is on the table. If you're not offered a next step, whether that's a referral, a repeat test, or a management plan, ask for one directly.

How Can MyOva Support PMOS (PCOS)?

Blood tests tell you what's going on. What you do next is where the real work starts. MyOva's supplements are formulated around the two markers that come up most often in this guide: insulin sensitivity and metabolic balance. Myoplus is built around myo-inositol, one of the better-researched options for supporting ovulatory cycles and insulin sensitivity in PMOS (PCOS).⁵ Metabolism is designed to work alongside it for broader blood sugar support. Neither is a replacement for testing, diagnosis, or medical care. It's not a magic fix. But it gives your body what it's often missing, once you actually know what you're working with.

Frequently Asked Questions

Can I ask for these tests without a PMOS (PCOS) diagnosis?

Yes. You don't need a diagnosis to request blood tests, only symptoms worth investigating.

You can raise symptoms like irregular cycles, acne, or unexplained hair changes and ask for these tests as part of working out what's going on. A diagnosis usually comes after testing, not before it.

What's the difference between fasting insulin and fasting glucose?

Glucose measures your blood sugar directly, while insulin shows how hard your body is working to keep that sugar in range.

You can have completely normal glucose while your insulin is already elevated, because insulin resistance often shows up years before blood sugar itself becomes abnormal. That's exactly why fasting insulin is worth asking for on its own, rather than assuming a normal glucose reading covers it.

When in my cycle should I get these tests done?

Day 2 to 5 of your cycle is standard for LH, FSH, and testosterone, if your cycles are regular enough to time it.

If your cycles are irregular or absent, as they often are with PMOS (PCOS), your doctor may simply test on any available day and interpret the results with that in mind, or ask you to repeat certain tests later. Fasting insulin, glucose, TSH, and AMH aren't cycle-day dependent, so those can be booked whenever suits you.

My results came back "normal" but I still have symptoms. What now?

Normal results don't cancel out real symptoms, ask for a referral or a second opinion.

Symptoms without a clean blood test result are still a valid reason to keep investigating, particularly if not every test on the list above was actually run. Ask specifically which tests were included, request any missing ones, and consider a referral to a gynaecologist or endocrinologist if your GP has reached the end of what they can offer.

How does Myoplus relate to the tests in this guide?

Myoplus is formulated around insulin sensitivity, the same marker your fasting insulin test measures.

If your results show insulin resistance, or sit at the higher end of your lab's range alongside PMOS (PCOS) symptoms, that's exactly the marker myo-inositol has the most research behind. It works alongside dietary and lifestyle changes, not instead of them.

How often should I repeat these tests?

Once you have a diagnosis, annual retesting is typical, though your doctor may suggest sooner if you change treatment or medication.

PMOS (PCOS) markers can shift with weight changes, new medications, supplements, or simply time, so an annual check-in is a reasonable default once you're diagnosed and stable. If you start a new treatment, whether that's a supplement like myo-inositol, a medication, or a significant lifestyle change, retesting a few months in gives you a genuine before-and-after comparison rather than a guess.

Conclusion

The research on this is actually pretty clear: PMOS (PCOS) is not a single blood test away from being confirmed or ruled out. It's a pattern across insulin, androgens, thyroid function, reproductive hormones, and AMH, read together against your actual symptoms. Ask for the full picture, not just the tests that happen to be on a standard panel, and don't let one "normal" result talk you out of trusting what your body is telling you.

Further Reading

• The Best Supplements for PCOS: What the Research Actually Says
• Ear Seeds and Auricular Acupuncture: Do They Actually Work?
• Why Nervous System Regulation Matters for Hormone Health, Menstrual Cycles, and PMS

References

1. Prosperi S, Chiarelli F. Insulin resistance, metabolic syndrome and polycystic ovaries: an intriguing conundrum. Front Endocrinol. 2025;16:1669716. doi:10.3389/fendo.2025.1669716
2. Wang K, Li Y, Chen Y. Androgen excess: a hallmark of polycystic ovary syndrome. Front Endocrinol. 2023;14:1273542. doi:10.3389/fendo.2023.1273542
3. Practice Committee of the American Society for Reproductive Medicine. Subclinical hypothyroidism in the infertile female population: a guideline. Fertil Steril. 2024;121(5):765-782.
4. Yesiladali M, Yazici M, Korun ZEU, Attar R, Attar E, Kelestimur F. Reassessing the luteinizing hormone/follicle-stimulating hormone ratio in polycystic ovary syndrome: associations with a possible neuroendocrine and anti-Mullerian hormone-related phenotype. Clin Endocrinol. 2026;105(4). doi:10.1111/cen.70179
5. Fitz V, Graca S, Mahalingaiah S, et al. Inositol for polycystic ovary syndrome: a systematic review and meta-analysis to inform the 2023 international evidence-based guideline. J Clin Endocrinol Metab. 2024;109(6):1630-1655. doi:10.1210/clinem/dgad762

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 before making changes to your testing, diet, supplements, or treatment plan, 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