PCOS Has a New Name: Introducing PMOS

If you’ve been diagnosed with PCOS (Polycystic Ovarian Syndrome), you may have recently heard that the condition has a new name: PMOS — Polyendocrine Metabolic Ovarian Syndrome.

And while changing one letter might not sound like a big deal, this name change represents a much broader shift in how we understand the condition.

Why has PCOS been renamed?

The term “polycystic ovarian syndrome” has long been criticised for being misleading.

For starters, PCOS isn’t actually about having ovarian cysts. The small follicles that may be seen on an ultrasound are not the same as pathological ovarian cysts, and not everyone with PCOS has polycystic-appearing ovaries.

More importantly, PCOS is far more than an ovarian or reproductive condition.

It’s a complex condition involving interconnected hormonal, metabolic, and reproductive pathways, with symptoms ranging from irregular periods and anovulation to elevated insulin levels, blood sugar dysregulation, weight gain, elevated male hormones, acne, hirsutism, hair loss from the scalp, and fertility challenges.

The new name — Polyendocrine Metabolic Ovarian Syndrome (PMOS) — aims to better reflect this complexity.

What does PMOS mean?

Each part of the new name highlights an important aspect of the condition:

Polyendocrine
PMOS involves multiple hormonal and endocrine pathways. Androgens such as testosterone are important, but so are hormones involved in ovulation, insulin regulation, and the communication between the brain, pituitary gland, and ovaries.

Metabolic
Metabolic health is an important part of PMOS. Insulin resistance and altered glucose regulation often occurs alongside the condition and can influence reproductive hormones, ovulation, and androgen levels.

Ovarian
The ovaries remain an important part of the condition, particularly because PMOS can affect ovulation, menstrual cycles, and fertility.

Syndrome
PMOS is a collection of interconnected signs and symptoms rather than one single problem. This is why two people with PMOS can experience completely different symptoms.

A move towards a more holistic understanding

As a naturopath, I think this shift is particularly valuable because it reinforces something we already know clinically: there is no one-size-fits-all approach to PMOS.

Two people can both meet the diagnostic criteria for PMOS while experiencing very different symptoms and having different underlying factors contributing to their presentation.

For one person, insulin resistance may be a major factor. For another, elevated androgens and disrupted ovulation may be more prominent. For someone else, factors such as inflammation and stress may also play a role.

This is why understanding the different aspects of PMOS — rather than focusing solely on the ovaries — is so important when it comes to assessment and management.

The name change doesn’t mean that PMOS itself has changed. Rather, it reflects a growing understanding that this is a complex condition involving much more than the ovaries alone.

Ultimately, the move from PCOS to PMOS is about improving understanding, reducing misconceptions, and better reflecting the hormonal, metabolic and reproductive aspects of the condition.

A new name, and hopefully, a more complete understanding of the condition.