PCOS Has Been Renamed PMOS: What the Change Means for Mental Health

Women's HealthPCOSPMOSMental Health
Written By Jill Hahn

On May 12, 2026, a landmark global consensus study published in The Lancet officially renamed polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS).

For the millions of people living with this diagnosis, the renaming carries real meaning — especially when it comes to mental health.

PMOS and Mental Health

For years, research has consistently shown that people with PCOS experienced significantly higher rates of:

  • Anxiety

  • Depression

  • Disordered eating

  • Body image distress

  • Chronic stress

  • Emotional exhaustion

These were often treated as separate concerns or as side effects of living with a chronic condition. The PMOS renaming reflects a growing scientific consensus that these mental health outcomes are shaped by the same interconnected, bidirectional endocrine, inflammatory, metabolic, and nervous system processes that define PMOS itself.

Several key biological mechanisms help explain why.

Insulin resistance

Insulin resistance is one of the hallmark features of PMOS. Its effects extend well beyond metabolism.

Insulin resistance has been associated with increased rates of anxiety and depression. Researchers increasingly believe this relationship runs in both directions: hormonal and metabolic dysregulation can negatively affect mood, while chronic stress and mental health symptoms can, in turn, worsen insulin resistance and inflammation. Each can amplify the other, creating cycles that are difficult to break without addressing both.

Stress response (HPA axis dysregulation)

Research suggests PMOS may affect the hypothalamic-pituitary-adrenal (HPA) axis — the body's central stress-response system.

When you experience stress, physical or emotional, the HPA axis activates to help regulate energy, alertness, and inflammation. When it is functioning well, it turns on and off appropriately. When it is dysregulated, as it often is in PMOS, cortisol patterns can become disrupted, contributing to symptoms like anxiety, fatigue, sleep disturbance, and difficulty regulating mood.

Chronic inflammation

PMOS is also associated with chronic low-grade inflammation, which scientists link to insulin resistance, body composition, and hyperandrogenism. Inflammation does not only affect the body — it also affects the brain. Research has linked inflammatory processes to depression, anxiety, fatigue, and altered stress response patterns.

The Gut-Brain Connection

Emerging research has also identified a connection between PMOS, the gut microbiome, and mental health.

Researchers have found that many people with PMOS show changes in their gut microbiome — the community of bacteria and other microorganisms living in the digestive tract — compared to those without the condition.

Importantly, the gut and brain communicate constantly through what is known as the gut-brain axis, a bidirectional communication system involving the nervous system, immune system, hormones, and microbiome signaling. Disruptions in this system have increasingly been linked to anxiety, depression, and stress-related disorders.

Androgens

Androgens are a group of hormones — testosterone being the most recognized — that play a role in reproductive function, metabolism, bone density, and more. While often thought of as "male hormones," androgens are present and important in all bodies. In PMOS, androgen levels are frequently elevated, a state known as hyperandrogenism, and this excess is one of the defining features of the condition. Androgen dysregulation has been found to influence mood and anxiety directly, through effects on the nervous system and neurotransmitter pathways.

Additionally, elevated androgens can cause physical acne, excessive hair growth, and hair thinning. Hyperandrogenism also leads to changes to the menstrual cycle, with some women not ovulating at all and others with long or irregular cycles. All of these physical experiences can serve as emotional stressors, activating our stress response system and increasing our chronic stress.

What This Means If You Have PMOS (or Were Diagnosed With PCOS)

If you were diagnosed with PCOS — now PMOS — and you experience anxiety, depression, or other mental health symptoms, the connection is real and biologically supported. The endocrine and metabolic mechanisms of PMOS don’t only exist in your body - they reach your brain, too.

That means that mental health care is an integral part of treating PMOS.

What that care might look like:

  • Therapy with a provider who understands. Not all therapists are familiar with how conditions like PMOS affect mood. Seeking out someone with this background — or being willing to educate a provider you trust — can make a significant difference.

  • Addressing anxiety and depression directly. Given the bidirectional relationships at play, it is important to care for your mental health. Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT) are evidence-based for PMOS. This means that research has found they improve mood-related symptoms, anxiety, and support successful implementation of lifestyle changes to improve endocrine and metabolic health.

  • Recognizing stress as a physiological factor. Because of HPA axis dysregulation, stress in PMOS is not just emotional — it has measurable hormonal effects. Therapeutic approaches that build stress regulation skills can calm your nervous system.

  • Communicating openly with your medical team. If you are experiencing mental health symptoms, they are relevant clinical information and your doctor wants to know about them to support you.

References

Jill Hahn