Ovarian hyperthecosis: high testosterone after menopause

Author: Josephine Cabrall
Fertility Specialist Naturopath | BHSc(NAT) | NHAA

Last reviewed: June 26, 2026

Ovarian hyperthecosis is a condition where the ovaries quietly produce far too much testosterone and other androgens, usually after menopause. It happens when hormone-making cells (theca cells) build up and become active deep inside the body of the ovary, churning out male-type hormones years after the ovaries were supposed to wind down.¹

Ovarian hyperthecosis is the most common reason a woman develops genuine androgen excess after menopause – the medical term for this is postmenopausal hyperandrogenism – and although it is not cancer, it should never be ignored: the same high androgen levels that cause unwanted hair and other body changes also signal real risks to metabolic and uterine health.^1,5

If you have noticed new facial or body hair, a deepening voice or thinning scalp hair in your fifties, sixties or beyond, this is a condition worth knowing about – and worth pushing your doctor to investigate properly.

What is ovarian hyperthecosis?

The ovary is made of more than just eggs. Surrounding and supporting the eggs is a dense tissue called the stroma, and scattered through it are theca cells, whose job is to make hormones. In ovarian hyperthecosis, also known as ovarian stromal hyperthecosis, islands of these theca cells multiply through the stroma and switch into a luteinised, hormone-pumping state, producing large amounts of androgens such as testosterone.^1,5

The word breaks down neatly: ‘hyper’ meaning too much, and ‘theca’ for the theca cells. So hyperthecosis simply means too many over-active theca cells. It is closely related to a milder change called ovarian stromal hyperplasia, where the supporting tissue thickens without quite as much hormone production.⁵

This is not a tumour and not cancer. It is a functional change in the ovarian tissue itself, which is part of why it can be missed – scans may show ovaries that are only mildly enlarged, with no obvious lump to point to.^1,6

In our clinic, we often meet women well past menopause who have been told that new facial hair or a thinning scalp is just part of getting older, when in fact their testosterone is quietly running several times higher than it should be.

We look at the whole hormonal and metabolic picture rather than the cosmetic symptom alone, because hyperthecosis rarely travels by itself – it usually arrives hand in hand with insulin resistance that needs treating in its own right.

Why does it happen?

The honest answer is that the exact cause is still not fully understood, but two threads come up again and again.¹

The first is the hormonal shift of menopause. As the ovaries stop releasing eggs, levels of luteinising hormone (LH) from the brain climb and stay high. In a susceptible ovary, that constant LH signal seems to drive the stromal theca cells to grow and over-produce androgens.¹

The second, and arguably more important, thread is insulin resistance. Most people with hyperthecosis have high insulin levels, and insulin is a powerful stimulant of androgen production in the ovarian stroma.^1,2

This is why hyperthecosis travels so closely with metabolic problems – higher body weight, raised blood pressure, type 2 diabetes and the velvety, darkened skin patches called acanthosis nigricans.² When these features cluster together with severe androgen excess, doctors sometimes use the label HAIR-AN, which stands for hyperandrogenism, insulin resistance and acanthosis nigricans.²

So the picture is rarely a lone ovary misbehaving. It is more often a whole-body metabolic story, with the ovary responding to the signals it is being given.

Signs and symptoms

The hallmark of hyperthecosis is androgen excess that comes on slowly and keeps getting worse over months to years. That gradual, progressive pattern is an important clue.^1,3

The signs to watch for include:

new or increasing coarse, dark facial and body hair (hirsutism)
thinning scalp hair or a receding hairline (androgenic alopecia)
a deepening voice, more muscle or other masculinising changes (virilisation)
raised blood sugar, weight gain around the middle, or new type 2 diabetes
symptoms that come on gradually and keep getting worse

Hair changes you can see

Most people first notice hirsutism – coarse, dark hair appearing in a male pattern on the chin, upper lip, chest, abdomen or back. At the same time, the hair on the scalp can thin in a male pattern – a type of hair loss called androgenic alopecia – particularly around the temples and crown.^1,3

Virilisation, the stronger signal

When androgen levels climb high enough, the body can start to take on more masculine features, a process called virilisation (or masculinisation). This can include a deepening voice, more muscle, and enlargement of the clitoris – the same kind of clitoral change seen with high testosterone in other settings, such as bottom growth in trans men on testosterone.^1,3 Virilisation is a red flag that warrants prompt investigation, because it points to markedly high androgens.³

The metabolic signs underneath

Because hyperthecosis is so tied to insulin, many people also have features of metabolic syndrome – higher blood sugar, raised blood pressure, weight gain around the middle, and sometimes a new diagnosis of type 2 diabetes around the same time as the hair changes.² These are not coincidences; they are part of the same underlying process.

How is it different from PCOS?

Hyperthecosis is often described as a severe cousin of polycystic ovary syndrome (PCOS). The two overlap a great deal: both involve androgen excess and insulin resistance, and both run on the same ovary-and-metabolism machinery.^1,2

There are some useful differences, though. PCOS usually shows up in the reproductive years and is diagnosed using the Rotterdam criteria, with many small follicles visible on the ovaries. Hyperthecosis, by contrast, tends to appear later – classically after menopause – produces higher testosterone levels, and is more likely to cause true virilisation rather than the milder symptoms typical of PCOS.^1,5

In younger people, the line between the two can blur, and a premenopausal person with hyperthecosis is often managed much like someone with severe PCOS once other causes have been ruled out.

How is it diagnosed?

The first step is usually a blood test for testosterone. In hyperthecosis, total testosterone is typically high, and a very high level prompts urgent imaging to rule out a hormone-producing tumour of the ovary or adrenal gland.^1,6

Doctors usually measure another androgen, DHEAS, at the same time. In hyperthecosis it is the testosterone that is raised while DHEAS stays normal, which points to the ovaries rather than the adrenal glands as the source.^1,6

One important catch: testosterone is not always dramatically raised. Some people with proven hyperthecosis have only modestly elevated levels, so a ‘not that high’ result does not rule the condition out if the symptoms are convincing.⁶ This is exactly why an experienced clinician matters.

Imaging usually comes next. A transvaginal ultrasound often shows both ovaries enlarged and solid-looking, without a single discrete mass – which helps separate hyperthecosis from an androgen-secreting tumour, where a lump is usually visible on one side.^1,3

When the source is still unclear, two specialist tests can help. A GnRH agonist stimulation test temporarily quietens the ovaries; if testosterone falls substantially afterwards, it points to an ovarian, gonadotropin-driven source like hyperthecosis rather than an autonomous tumour. The alternative is ovarian vein sampling, which measures hormone levels in the blood draining from each ovary directly.⁴ Each approach has strengths, and the choice depends on the individual and the centre.⁴

Why it matters: the risks if it is left alone

Hyperthecosis is benign in the sense that it is not cancer, but leaving it untreated is not harmless. The excess androgens are converted in body fat into oestrogen, and after menopause that unopposed oestrogen can over-stimulate the lining of the uterus, raising the risk of endometrial thickening and endometrial cancer.¹

On top of that, the insulin resistance that drives the condition carries its own long-term risks – type 2 diabetes and cardiovascular disease among them.^1,2 Treating hyperthecosis is therefore about much more than cosmetic concerns; it is about protecting the uterus, the heart and the metabolism.

This is one place where our clinical view and the research agree strongly: vaginal and pelvic symptoms are frequently the end result of a wider body process, not a stand-alone problem. Hyperthecosis is a clear example, where the surface sign is hair, but the work that protects health is metabolic.

How is it treated?

Treatment is tailored to the individual, and depends heavily on whether someone is past menopause and on their other health conditions.

Surgery

For postmenopausal women, removing both ovaries (bilateral oophorectomy) is the definitive treatment and usually resolves the androgen excess, because it removes the tissue producing the hormones.^2,3 Reported cases describe testosterone normalising and symptoms settling after surgery, sometimes with better blood sugar control as a bonus.²

Medication when surgery is not the answer

When surgery is too risky, not wanted, or when someone is younger and may want to preserve fertility, medicines are used instead. GnRH agonists can switch off the ovarian signal that drives androgen production, and are sometimes used long-term with careful monitoring.^2,4 Anti-androgen medicines and combined hormonal contraception can help manage symptoms in premenopausal people.

Treating the metabolic root

Because insulin resistance sits underneath so much of this, addressing it directly is part of good care – through insulin-sensitising medication where appropriate, alongside nutrition, movement and the broader metabolic support that helps blood sugar and weight.² In our experience, this whole-person piece is what turns a temporary fix into lasting improvement.

Frequently asked questions

Is ovarian hyperthecosis cancer?

No. It is a benign, functional change in the ovarian tissue, not a tumour.¹ That said, it does need investigating to rule out an androgen-producing tumour, and treating to reduce the downstream risks to the uterus and metabolism.¹

Can you get it before menopause?

Yes, although it is most common after menopause. In younger people it can look very much like severe PCOS and is often managed in a similar way once other causes are excluded.⁵

Why is my testosterone high but the scan looks almost normal?

This is classic for hyperthecosis. The change is spread through the ovarian tissue rather than forming a lump, so ovaries may look only mildly enlarged. Specialist tests such as a GnRH agonist test or ovarian vein sampling can help confirm the source.^4,6

Will my voice and hair changes reverse with treatment?

Some changes improve once androgen levels come down – hirsutism often eases and scalp hair may recover. Deeper structural changes, such as a lowered voice or clitoral enlargement, may not fully reverse, which is one reason early diagnosis matters.³

Does hyperthecosis affect the vaginal microbiome?

It can, indirectly. Shifts in oestrogen and androgens after menopause change the vaginal environment, and a low-oestrogen state tends to make the tissue thinner and drier. If you are noticing vaginal changes alongside hormonal symptoms, they are worth raising too.

What to do next

If you are developing new or worsening hair growth, scalp thinning, a deepening voice or other body changes after menopause, see a doctor and ask specifically for a testosterone blood test. Progressive androgen symptoms always deserve a proper work-up, and you are entitled to push for one if you are being brushed off.

If you would like to talk it through, you can ask Aunt Vadge’s Assistant using the chat widget in the bottom left of your screen, or book in with one of our practitioners for personalised guidance on the hormonal and metabolic picture.

This article is general information and not a substitute for personalised medical advice. Please discuss your individual situation with a qualified health practitioner.