Types & Diagnosis

The four phenotypes, Rotterdam criteria, which labs to ask for, and how to read the results you already have.

• HOMA-IR Score for PCOS: What It Means and Why There's No One CutoffA HOMA-IR score for PCOS has no universal cutoff — published thresholds range 2.0–2.9 depending on lab and assay. What the number is, its limits, and better tests.
• PCOS Pelvic Ultrasound Results Explained, Number by NumberReading a PCOS pelvic ultrasound report: what follicle count, ovarian volume, and endometrial thickness numbers mean, and why a scan alone can't diagnose PCOS.
• Can PCOS Be Misdiagnosed? Two Errors, Different HarmsPCOS can be misdiagnosed both ways: six look-alike conditions get missed, and one of them worsens on the standard PCOS advice to eat less and move more.
• Polycystic Ovaries But Not PCOS: The Scan Finding Isn't the DiagnosisA polycystic-looking scan is not a PCOS diagnosis. About a third of ovulating women have it. Why the Rotterdam rule still requires two of three criteria.
• AMH vs. Antral Follicle Count for PCOS: What the 2023 Guideline Actually ChangedAMH vs antral follicle count for PCOS diagnosis: what the 2023 guideline allows in adults, why cost and invasiveness differ, and why teenagers are excluded.
• Estrogen Dominance Test for PCOS: What It Actually ShowsNo diagnostic criteria recognize 'estrogen dominance.' What salivary and urine hormone panels actually measure, and the real PCOS mechanism behind the symptoms.
• PCOS Lipid Panel: What Each Number Measures and Why It's TestedThe PCOS lipid panel tests triglycerides, HDL, LDL and total cholesterol. What each one measures, real reference ranges, and the fasting question, explained.
• PCOS Diagnosis on Birth Control: What Can Still Be AssessedHormonal contraception masks cycle pattern and androgens for PCOS diagnosis — but pre-pill history, existing hirsutism, and metabolic markers stay readable.
• How Much Does PCOS Testing Cost Without Insurance?PCOS testing has no fixed price — it depends on country, insurer, and whether a lab bulk-bills. What sets the cost in five markets, and how to estimate yours.
• CRP and PCOS: What an Inflammation Marker Can and Cannot Tell YouWhy CRP runs higher in PCOS on average, why one result can't diagnose anything by itself, and why the international guideline never mentions testing for it.
• Estradiol Levels in PCOS: Why Yours May Look Normal and Still MatterWhy estradiol usually looks unremarkable in PCOS, what actually shifts the number — cycle day, the pill, assay method — and why it's not a diagnostic criterion.
• PCOS Types: The Four Real Phenotypes, and How Diagnosis WorksThe '4 types of PCOS' online aren't a real diagnosis. Here are the four Rotterdam phenotypes that are, the tests in order, and what the 2023 guideline changed.
• Transvaginal vs Abdominal Ultrasound: Which the PCOS Criteria NeedWhy the PCOS follicle count threshold assumes a transvaginal scan, why abdominal can't reliably reach it, and what to do when transvaginal isn't an option.
• Is PCOS Hereditary? What Twin Studies and Family Risk Data ShowPCOS is not caused by one gene, but it clusters strongly in families. Twin data, sibling risk figures and six known gene regions explain why.
• When in Your Cycle to Get PCOS Blood Tests — and What Day 3 Actually MeansCycle day 2–5 is when LH, FSH and androgens give a comparable reading. AMH, TSH and prolactin don't need that timing — here's the test-by-test breakdown.
• PCOS in Teenagers: Why the Criteria Are Different Before 18Adolescent PCOS diagnosis uses stricter rules than the adult ones — no ultrasound, no AMH, and irregular cycles must persist for years, not months.
• High Prolactin or PCOS? Why Both Stop Your Periods and How Tests Tell Them ApartHigh prolactin and PCOS both stop regular ovulation, but for different reasons. The specific signs, prolactin level, and pitfall that actually separate them.
• PCOS vs Cushing's Syndrome: The Features That Separate ThemPCOS and Cushing's syndrome both cause irregular periods, acne and weight gain. The signs and cortisol test that separate a rare condition from a common one.
• PCOS vs Endometriosis: Different Diseases, Overlapping SymptomsPCOS and endometriosis share irregular cycles, pelvic pain and infertility but are separate diseases. The feature table and test that tells them apart.
• Are the 4 Types of PCOS Real? What the Phenotypes Actually AreThe '4 types of PCOS' online aren't a real diagnosis. Here's the actual Rotterdam A-D phenotype system doctors use, and what each label means.
• AMH in PCOS: What the Number Means and Why It Is Not a DiagnosisAMH in PCOS explained: what the number means, why the 2023 guideline uses it instead of ultrasound in adults, and why it isn't a fertility countdown.
• Can You Have PCOS With Regular Periods? Ovulatory PCOS ExplainedRotterdam criteria don't require irregular cycles. Ovulatory PCOS (phenotype C) appears in a third of unselected cases. Regular bleeding isn't proof of ovulation.
• Can You Have PCOS Without Cysts? Yes — and the Name Is the ProblemRotterdam criteria need only two of three features. Phenotype B — PCOS without polycystic ovaries — makes up 13 to 25% of cases. What that means for your scan.
• Normal DHEA-S Levels by Age: What's Typical, and What Isn'tNormal DHEA-S ranges by age, what androstenedione adds to the picture, and why a level above roughly 700 µg/dL points past PCOS to a tumour work-up.
• The DUTCH Test for PCOS: What It Measures and Whether It Changes TreatmentThe DUTCH test reads dried urine for hormone metabolites. What it actually measures, why no guideline recommends it for PCOS, and whether results change care.
• The Ferriman-Gallwey Score: How Hirsutism Is Actually MeasuredThe Ferriman-Gallwey score rates hair growth at nine body sites on a 0–4 scale. What counts as hirsutism, why ethnicity shifts the cutoff, and its real limits.
• Free vs Total Testosterone in PCOS: Why One Can Be Normal and the Other NotWhy free testosterone catches PCOS hyperandrogenism that total testosterone misses, what the free androgen index actually measures, and how high SHBG hides it.
• How Long a PCOS Diagnosis Takes — and Why the Average Is Over Two YearsOne-third of women wait over two years for a PCOS diagnosis. Why exclusion-based testing takes so long, what speeds it up, and who it fails most often.
• Is PMOS the Same as PCOS? Yes — Here Is Exactly What ChangedPMOS and PCOS are the same condition. A 2026 global consensus in The Lancet changed the name, not the diagnostic criteria, the biology, or the treatment.
• Lean PCOS: Diagnosis, Insulin Resistance, and Why BMI Misleads HereLean PCOS still carries real insulin resistance a normal BMI hides. How it's diagnosed, why it's confused with hypothalamic amenorrhea, and what helps.
• LH:FSH Ratio in PCOS: What 2:1 Means and Why It Is Not DiagnosticThe LH:FSH ratio in PCOS, explained: what a 2:1 or 3:1 result means, how to calculate it, and why the current guideline does not use it to diagnose.
• Low SHBG in PCOS: Why It Matters More Than Total TestosteroneLow SHBG in PCOS raises free testosterone even when total testosterone looks normal. What SHBG measures, real reference ranges, and what a low result means.
• Non-Classic CAH vs PCOS: The Look-Alike Found in 1 in 24 Hyperandrogenic WomenNon-classic CAH mimics PCOS in roughly 1 in 25 to 1 in 10 hyperandrogenic women. The 17-hydroxyprogesterone test that tells them apart, the cutoffs, and when to ask.
• The OGTT With Insulin: The Test Most PCOS Work-Ups SkipWhy an oral glucose tolerance test catches PCOS glucose problems that HbA1c misses half the time, and how HOMA-IR, QUICKI and the Matsuda index actually compare.
• Ovarian Resistance Syndrome vs PCOS: A Rare Condition That Mimics ItOvarian resistance syndrome causes high FSH, low estrogen and missed periods with normal ovarian reserve — unlike PCOS or menopause. What it is and treatment.
• PCOS Blood Tests: The Panel to Ask For and How to Read ItThe PCOS blood test panel explained: which hormones get tested, real reference ranges, and why a Labcorp result and a Quest result aren't always comparable.
• PCOS With Normal Labs: Why the Bloods Can Look FinePCOS with normal blood tests is real: one Rotterdam phenotype needs no elevated androgens at all. What normal labs rule out, and what they don't.
• PCOS Diagnosis: What Gets Tested, and In What OrderHow a PCOS diagnosis is actually made — the two-of-three rule, which bloods run first, what has to be ruled out, and when an ultrasound is not needed.
• PCOS Diagnosis Without an Ultrasound: When It's Still ValidPCOS diagnosis without an ultrasound is possible for many people. When the two-of-three rule applies, when AMH can substitute, and when a scan is still needed.
• PCOS Diagnostic Criteria: The Rules Your Doctor Is Actually UsingThe PCOS diagnostic criteria compared — NIH 1990, Rotterdam 2003 and AE-PCOS 2006 side by side, the thresholds that count, and what the 2023 guideline changed.
• PCOS ICD-10 Code E28.2: What It Covers and Why Your Claim Was DeniedThe PCOS ICD-10 code is E28.2. What it covers, why claims still get denied under it, how PMOS is coded, and what to say if a claim is rejected.
• PCOS in Perimenopause: What Changes, What Persists, What Is MissedPCOS cycles often regularize in perimenopause as follicles decline, but the metabolic and androgen risk mostly does not, and diagnosis gets harder to confirm.
• PCOS Is Now PMOS: What Changed, and What Didn'tPCOS was renamed polyendocrine metabolic ovarian syndrome (PMOS) in 2026. What changed is the name — not the criteria, not your diagnosis, not your treatment.
• PCOS Ultrasound Criteria: Follicle Count and Volume ExplainedPCOS ultrasound criteria explained: the follicle count and volume thresholds that count, the string of pearls pattern, and what a scan alone cannot tell you.
• PCOS vs PMOS: What Changed When the Name DidPCOS and PMOS are one condition with two names. What the 2026 rename changed, what it left untouched, and which word to use where — records, labs, research.
• PMOS Diagnosis Criteria: What Actually Gets CheckedThe PMOS diagnosis criteria in full — the two-of-three rule for adults, follicle and AMH thresholds, what gets ruled out first, and the stricter adolescent bar.
• PMOS Meaning: What the New PCOS Name Actually SaysPMOS stands for polyendocrine metabolic ovarian syndrome — the 2026 consensus name for PCOS. What each word means, and what the change does not alter.
• PMOS vs PCOD: Same Condition, Three Different NamesPMOS and PCOD describe one condition. PCOD is an older informal term with no diagnostic criteria of its own — and it does not mean you have a milder case.
• 32 Questions to Ask Your Doctor About PCOS (By Appointment Type)32 PCOS questions grouped by appointment — first visit, lab review, fertility and medication review — so you bring the right ones to the right visit.
• The Rotterdam Criteria: The Two-of-Three Rule, ExplainedWhat the Rotterdam criteria actually say, the four phenotypes they created, how they differ from the NIH and AE-PCOS rules, and what the 2023 guideline changed.
• Do I Need to Tell My Doctor PCOS Is Now PMOS?No — the PMOS rename does not change your diagnosis, your code or your prescriptions. Here is when it is still worth saying out loud, and what to ask instead.
• Which Doctor to See for PCOS: GP, Gynaecologist or EndocrinologistA GP, gynaecologist or endocrinologist can diagnose PCOS. What each treats, when to ask for a referral, and how it works in the US, UK, Australia and Canada.
• Why Was PCOS Renamed? The Four Reasons Behind the Switch to PMOSPCOS was renamed polyendocrine metabolic ovarian syndrome in 2026. The four evidence-based reasons behind the change, and what it does not change.