PCOS (Now PMOS): a clinician’s guide to root causes, testing, and reversing it naturally.

The name just changed — and the reason matters

On 12 May 2026, in a paper published in The Lancet, polycystic ovary syndrome was formally renamed polyendocrine metabolic ovarian syndrome — PMOS.

This was not a cosmetic decision. It came out of an eleven-year global consensus process led by Professor Helena Teede at Monash University, drawing on roughly 22,000 responses from patients, clinicians, researchers and advocacy groups across every world region, with 56 professional and patient organisations involved. The Endocrine Society and the American Society for Reproductive Medicine have both endorsed it.

And the reason given is precisely the argument this article was already going to make. The old name was inaccurate. It implied pathological ovarian cysts, it obscured the endocrine and metabolic features that actually define the condition, and it contributed directly to delayed diagnosis, fragmented care and stigma.

Look at what the new name puts first:

• Polyendocrine — multiple hormone systems are involved, not just reproductive ones.
• Metabolic — insulin resistance and cardiometabolic risk are core features, not complications.
• Ovarian — still involved, but now third in the list rather than the entire framing.

The word “cystic” is gone entirely, because the follicles seen on an ultrasound were never cysts and were never the disease.

Why it takes years, and three doctors, to be told what you have

Before we get to the biology, I want to acknowledge something, because almost every woman who comes to us about PCOS has been through the same experience.

It affects roughly one in eight women — more than 170 million worldwide — and is the most common cause of infertility on earth. And yet in the largest study to look at time-to-diagnosis, more than a third of women waited over two years to be diagnosed, nearly half saw three or more health professionals before anyone named it, and only fifteen percent were satisfied with the information they eventually received.

In a separate Australian community cohort, half of the women who met full diagnostic criteria had never been diagnosed at all.

So if you have spent years being told your cycles are just irregular, that you should lose weight, that you should come back when you want to get pregnant — that experience is not unusual and it was not your fault. It is a systemic failure to look at the right thing.

The actual root cause of PMOS

Now that the name says “metabolic” out loud, the mechanism is easier to explain. What is actually happening usually begins with insulin.

Here is the chain, and once you see it the whole condition makes sense.

Insulin resistance means your cells respond poorly to insulin, so your pancreas produces more of it to get the same job done. Glucose stays normal — which is exactly why this goes undetected for years, because glucose is the thing that gets tested.

That elevated insulin then does two things at once. It acts directly on the theca cells of the ovary, driving them to produce more testosterone. And it suppresses the liver's production of SHBG, the protein that binds testosterone and keeps it inactive. So you produce more testosterone and bind less of it. Free testosterone rises from both directions simultaneously.

Everything you experience follows from there. High androgens disrupt the LH surge, so ovulation does not happen and cycles become irregular or disappear. They act on the skin, producing acne along the jaw and chin. They act on hair follicles, producing coarse hair where you do not want it and thinning where you do. And elevated insulin itself makes fat storage easy and fat release difficult, which is why the weight will not move.

Not all PMOS is the same — the four phenotypes

This is where most care goes wrong, and where we are genuinely different. There are four recognised phenotypes under the Rotterdam criteria, and they do not respond to the same interventions.

The distinction that matters most in practice is between the strongly insulin-resistant presentations and the leaner, adrenal-driven or inflammation-driven ones. A woman whose PCOS is driven by high DHEA-S and stress physiology will not respond to the same protocol as a woman with a fasting insulin of 16 — and giving her the insulin protocol anyway is why she has tried three things that did not work.

The bloodwork that actually finds it

A diagnosis made on symptoms and an ultrasound tells you that you have PCOS. It does not tell you why, or which lever will work for you. This panel does.

If you take one line from this page, take this one: ask for fasting insulin. It costs very little, it is the single most informative marker in the condition, and in my experience it is missing from the overwhelming majority of PCOS workups I am shown.

The ten levers that actually move PMOS

Ranked by how much change they produce and how consistently the evidence supports them. The first one is worth more than the other nine combined.

How we approach PMOS here

Four pillars, in a deliberate order. The order matters as much as the contents.

1. We measure before we treat

The full panel above, run before anything is recommended. That tells us your phenotype, your insulin picture, your androgen source — ovarian or adrenal — your thyroid status, your nutrient deficiencies and your inflammatory load. Every recommendation that follows traces to a number, and every number gets retested so you can see whether it worked.

2. Precision nutrition, written for you

Not a generic low-carb handout. A meal plan built from your panel — protein targets set to your body and your insulin, carbohydrates matched to what you actually tolerate, and specific foods chosen for the deficiencies we measured. Every meal comes with a recipe and a shopping list, because a plan you do not follow is not a plan.

3. Herbs and supplements, formulated rather than guessed

Inositol at the correct ratio. Berberine where insulin warrants it. Spearmint where free testosterone is the problem. Vitex only where the luteal phase genuinely calls for it — and never as a reflex. Our tinctures are compounded in our own apothecary, and everything is screened against your medications and your history before it reaches you.

4. Advanced therapies, where they add something

This is where being a full clinic rather than a nutrition practice matters. HOCATT and red light therapy support insulin sensitivity, circulation and the stress physiology that sits underneath so many PCOS presentations. Nutrient IV therapy corrects deficiencies fast when the gut is not cooperating. Where inflammation is a major driver, ozone therapies are available.

One thing we are careful about: for any woman actively trying to conceive or in the preconception window, we exclude hyperbaric oxygen, HOCATT and ozone therapies entirely. Those are excellent tools in the right context, and preconception is not that context.

What patients commonly experience under our care

When patients receive the proper guidance, here is what they commonly experience under our care.

• Weeks 1–3 — energy and cravings. Stabilising blood sugar removes the glucose swings that drive the mid-afternoon collapse and the evening carbohydrate pull. This is usually the first thing women notice, and it arrives well before anything changes on a panel.
• Weeks 4–8 — skin and sleep. As free testosterone begins to fall, jawline and chin acne typically settles. Magnesium and stabilised blood sugar together support the cortisol rhythm that allows melatonin to rise properly at night.
• Weeks 8–12 — the panel moves. This is where it shows on paper. Fasting insulin falling. HOMA-IR dropping. SHBG rising as the liver comes back online. Free testosterone coming down as a result. We retest here rather than asking anyone to take it on faith.
• Months 3–6 — cycles. The slowest and the most meaningful. Cycles become more regular and, more importantly, genuinely ovulatory — which we confirm with mid-luteal progesterone rather than assuming a bleed means ovulation happened. For many women this is also when conception becomes possible again.

If you have spent years being told to lose weight or come back when you want to get pregnant, I want you to know there is a real answer underneath all of it. Schedule a consultation and let my team find the actual driver of your PMOS. You deserve world-class care from a team who takes what you are experiencing seriously.

PMOS and fertility

PMOS is the most common cause of anovulatory infertility in the world, and it is also one of the most treatable — because the reason ovulation is not happening is usually addressable.

We are not a fertility clinic. We do not perform IVF or IUI, and we work alongside reproductive endocrinologists rather than in place of them. What we do is address why ovulation is not occurring: bring insulin down, bring free testosterone down, restore the LH signalling that triggers the surge, and correct the nutrient status a pregnancy will draw on.

Many women conceive naturally once cycles become ovulatory. For those who do go on to assisted reproduction, arriving with normalised insulin, corrected vitamin D and iron, an optimised thyroid and lower inflammation gives that process a considerably better foundation than arriving without any of it.

Working with us near Nashville

We see women with PMOS from across Middle Tennessee, and a meaningful number who travel in from out of state.

We are at 329 S. Royal Oaks Blvd, Franklin, Tennessee 37064 — about twenty minutes south of downtown Nashville, minutes from Cool Springs and Brentwood, and easy from Spring Hill, Murfreesboro and across Williamson County. For out-of-state patients we schedule visits in concentrated blocks and handle the nutrition protocol and follow-up remotely between trips.

Your first step is a free discovery call with my team. We will talk through your history, tell you honestly whether we think we can help, and explain exactly what we would test first.

Common questions about PCOS and PMOS