PMOS Awareness Month: Why Polycystic Ovary Syndrome Changed Its Name

Every September, Awareness Month marks one of the most common endocrine disorders in women of reproductive age. This year the date arrives with important news: the condition changed its name.

Since May 12, 2026, what was known for decades as polycystic ovary syndrome (PCOS) is officially called polyendocrine metabolic ovarian syndrome (PMOS). The change came out of a global consensus published in The Lancet and is backed by 56 patient and professional organizations, among them the Endocrine Society and the American Society for Reproductive Medicine.

This is not a cosmetic change. It reflects something research made clear over recent years: the condition involves metabolism and several hormonal systems, not the ovaries alone.

What PMOS is

Polyendocrine metabolic ovarian syndrome (PMOS, formerly polycystic ovary syndrome or PCOS) is an endocrine disorder that disrupts ovarian function and the production of various hormones.

It is a complex condition because it shows up in very different ways. Some women have highly irregular menstrual cycles. Others come in for persistent acne, excess hair growth, or difficulty getting pregnant. And some have almost no symptoms and receive the diagnosis during a routine checkup.

It is estimated to affect between 8% and 13% of women of reproductive age. Many go undiagnosed for years, because the symptoms get confused with other problems or simply become normalized.

Why the name changed

For decades, “polycystic ovary syndrome” served to identify the condition. As research advanced, the term became an obstacle.

First reason: the name poorly describes what is actually seen. Not every woman with this condition has polycystic-appearing ovaries on ultrasound. And there are women with multiple follicles who never develop the syndrome. The name suggested an imaging finding that is not always there.

Second reason, the more important one: it does not affect only the ovaries. It involves hormonal, metabolic, and endocrine changes that reach different organs and systems.

The international consensus also noted that the old term contributed to delayed diagnosis, fragmented care, and stigma. The new name calls the condition what it actually is: polyendocrine, metabolic, and ovarian.

Metabolism: the piece that spent years in the shadows

One of the biggest advances was understanding the weight of metabolism. For a long time, attention centered almost entirely on the ovaries and sex hormones.

Today we know that many women with PMOS also have metabolic changes that influence fertility and long-term health. The most common is insulin resistance: cells respond less effectively to this hormone, the body produces more to compensate, and that excess promotes greater androgen production in the ovary, which makes ovulation harder.

In addition, some patients may present:

• Changes in glucose metabolism
• Altered lipid profiles
• Higher risk of developing type 2 diabetes
• Low-grade chronic inflammation
• Higher long-term cardiovascular risk

Not every patient develops these changes. But understanding the metabolic component allows for considerably more complete treatment. We wrote about this link here: Insulin Resistance and Fertility: The Metabolic Link Many Couples Don’t Know About.

Diagnosis combines clinical history, hormones, ultrasound, and metabolic assessment

How it influences fertility

PMOS is one of the most frequent causes of ovulation disorders.

In a normal cycle, an ovarian follicle matures and releases an egg. With PMOS that process can happen irregularly or not happen at all during some cycles. Without ovulation, the chances of pregnancy drop.

Worth stating plainly: having PMOS does not mean you cannot have a baby. Different medical strategies exist depending on each patient’s characteristics. Age, ovarian reserve, metabolic health, and the partner’s sperm quality where applicable are all part of the assessment.

There is no single type of PMOS

Every woman experiences the condition differently. Some present with:

• Irregular menstrual cycles
• Persistent acne
• Excess facial or body hair
• Hair loss
• Difficulty managing weight
• Insulin resistance
• Metabolic changes

Others discover the diagnosis only when they start trying to conceive. That diversity explains why two patients with the same diagnosis may need completely different testing and treatment.

How it is diagnosed

Diagnosis does not rest on a single test. It usually includes:

• Complete clinical history
• Characteristics of the menstrual cycles
• Physical examination
• Hormone testing
• Gynecological ultrasound
• Metabolic evaluation when the specialist considers it necessary

One point worth underlining: diagnosis should never rest on the appearance of the ovary on an ultrasound alone. Clinical evaluation remains central, and that is precisely one of the reasons behind the name change.

Three myths worth dismantling

“Having PMOS means you’ll never get pregnant.” False. Many women with this condition have a baby, whether spontaneously or with personalized treatment.

“All women with PMOS are overweight.” False. There are patients at a weight considered healthy who also have it.

“If I have polycystic ovaries, I have PMOS.” False. The presence of multiple follicles on ultrasound is not enough for a diagnosis. Several clinical criteria are required.

Frequently asked questions

Do I have to change how I talk about my diagnosis?

There is no obligation, and your previous diagnosis remains valid. Over time you will increasingly see the term PMOS in medical reports and studies. If your record says PCOS, it refers to exactly the same condition.

Does the name change alter my treatment?

The name does not, but the approach it reflects does. Naming the metabolic and endocrine component pushes evaluation to include glucose, insulin, and lipid profile, not just sex hormones and ultrasound.

At what age should this be looked into?

When symptoms appear. Persistent irregular cycles, acne that will not clear, excess hair, or difficulty managing weight all justify an evaluation, whether or not you are trying to conceive right now.

I already have the diagnosis. What should I watch beyond fertility?

The metabolic component. Glucose, insulin, lipid profile, and blood pressure deserve regular follow-up, because long-term cardiovascular and type 2 diabetes risk is part of the picture.

At Ingenes we treat it as what it is: a systemic condition

We know PMOS influences each woman’s reproductive, metabolic, and hormonal health. That is why we perform a comprehensive evaluation that considers ovarian function along with the other factors involved in fertility, with precision diagnostics, highly specialized technology, and a multidisciplinary team.

Every patient has a different story and every body responds differently. If you have persistent symptoms, or already have the diagnosis and want a complete assessment, a First Consultation is the starting point.