When a High AMH Doesn’t Mean “Super Fertile”

PCOS, egg freezing, and one woman’s labs

In This Issue

• An AMH result that looked “super‑fertile” on paper

• Why high AMH in a PCOS‑type picture is often a risk flag, not a bonus

• How that result changed three things: the PCOS pattern , the egg‑freezing risk chat, and what we worked on first

She’s in her mid‑30s.
Carrying extra weight. Irregular cycles that have never really settled. Adult acne that overstayed its welcome.

She arrives with a set of basic GP labs.

On the report, everything is “within normal limits.”
On the actual numbers, her glucose and HbA1c are in pre‑diabetic territory and have been trending that way for years. Not yet bad enough to trigger a diabetes diagnosis. Clear enough, for me, that blood sugar and insulin are part of this story.

She isn’t trying to get pregnant. However, she is contemplating egg freezing.

So before we even talk about clinics, I ran a panel that included reproductive hormones (including AMH) and their upstream influences: thyroid, insulin and glucose, lipids, and the nutrients I care about when someone is about to ask their ovaries for extra work. Plus a CGM, so we can see what her glucose is actually doing in real time.

The story that comes back is exactly what her body has been hinting at for years: insulin resistance, acne, irregular cycles. A PCOS‑type picture that had never been joined up on paper.

This is where AMH can help.

For her age, it’s clearly high: she’s in her mid‑30s with an AMH of 28 pmol/L (about 4 ng/mL), which sits in the “very high for age” band.

High AMH: More Dancers, No Prima Ballerina

AMH is made by small, growing follicles.
More of those, more AMH. Fewer, less.

In a straightforward cycle, a small group of follicles starts to grow and one gradually pulls ahead. That one matures, ovulates, and gets to be the prima ballerina for the month.

In a PCOS‑type ovary with very high AMH, that selection process stalls. Too many follicles hover in the “almost” stage without any of them becoming the prima ballerina for the month.

Later, she has an ultrasound. The report comes back with the classic polycystic‑looking ovaries and a PCOS diagnosis from her doctor.

So when I see a very high AMH in a woman with irregular cycles, acne, insulin resistance and now a polycystic‑looking ovary on scan, I don’t see “super fertility.” I see:

• A lot of follicles stuck in early development

• A higher chance of no ovulation, or ovulation turning up occasionally

• A flag about how egg‑freezing (and IVF) medications are used

What That AMH Actually Changed

In this consult, the AMH did three useful things.

1. It strengthened the PCOS picture

A clearly high‑for‑age AMH sitting on top of dysglycaemia, acne, weight and cycle history told us these ovaries are crowded and reactive. It nudged us from “vibe of PCOS” to “we should treat this as PCOS‑type”.

2. It reshaped the egg‑freezing conversation

A high AMH like hers means that if a clinic stimulates her ovaries for egg freezing or IVF, they’re likely to respond strongly. That can mean more follicles and more eggs per cycle than someone her age with a very low AMH.

In a PCOS‑type ovary, that’s exactly where ovarian hyperstimulation syndrome (OHSS) shows up: very enlarged, painful ovaries, fluid in the belly, feeling bloated and unwell, and in bad cases, hospital. So this AMH result isn’t a “you’ll smash egg freezing” green light. It’s a clear flag that egg‑freezing medications need to be chosen and dosed carefully, with “enough response” as the target, not “as many eggs as possible.”

3. It set the limits of what AMH can tell her

Her number cannot tell her whether she’ll conceive naturally in two years’ time.
It cannot give a verdict on egg quality.
It certainly doesn’t operate as a fertility bank account that lets her ignore what her glucose, insulin and weight are doing.

What We Actually Did

The obvious next step wasn’t to rush her into a freezing cycle.
It was to work on the terrain those follicles are growing in.

We talked through the link between insulin resistance, ovarian function and this “crowded studio” ovary. We looked at what was realistic for her life in terms of food, movement, rhythm, workload and targeted supplements.

Then I put her on my PCOS protocol.

That’s my structured way of working on metabolic health, ovulation, inflammation and environment, then tailoring it to the person in front of me: her labs, her history, her job, her capacity.

In her case, the next step wasn’t to rush into a freezing cycle. It was to get the PCOS picture under better control - especially the blood sugar story - while she kept thinking and planning ahead about whether egg freezing was something she actually wanted to do, and if so, when.

Pop a Post‑It Note on Your Labs

• “High” has an age.
  A number that looks great on a chart still has to be read against your age, your cycles and your other labs.

• High AMH in a PCOS‑type picture ≠ super‑fertile.
  Think “crowded studio, no clear ovulation” and “handle stimulation drugs with care.”

• AMH is one piece of the puzzle.
  Use it to ask better questions about timing, clinic choice and metabolic health. Don’t let it be the only thing driving your decisions.

Warmly, Sonja

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This post is for educational purposes only and is not medical advice. Always consult a qualified practitioner before making decisions about your health.

References:

Dewailly D, Barbotin AL, Dumont A, Catteau-Jonard S, Robin G. (2020). Role of Anti-Müllerian Hormone in the Pathogenesis of Polycystic Ovary Syndrome. Frontiers in Endocrinology, 11, 641. https://doi.org/10.3389/fendo.2020.00641

Sun B, Ma Y, Li L, et al. (2021). Factors Associated with Ovarian Hyperstimulation Syndrome (OHSS) Severity in Women With Polycystic Ovary Syndrome Undergoing IVF/ICSI. Frontiers in Endocrinology, 11, 615957. https://doi.org/10.3389/fendo.2020.615957

Vale-Fernandes E, Pignatelli D, Monteiro MP. (2025). Should anti-Müllerian hormone be a diagnosis criterion for polycystic ovary syndrome? An in-depth review of pros and cons. European Journal of Endocrinology, 192(4), R29–R43. https://doi.org/10.1093/ejendo/lvaf062