A condition affecting an estimated 1 in 8 women worldwide has officially been renamed from polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS), in a major update aimed at improving diagnosis, treatment, and public understanding of the disorder.
The change follows more than a decade of collaboration among researchers and patient advocates and was published in The Lancet this week.
Why the Name of PCOS Was Changed
Experts behind the update say the old term “polycystic ovary syndrome” was misleading and too narrowly focused on ovarian cysts—despite many patients not having them.
Medical specialists argue the condition is better understood as a complex hormonal and metabolic disorder that affects multiple body systems, not just the ovaries.
Dr. Melanie Cree of the University of Colorado Anschutz Medical Campus, one of the researchers involved in the revision, said the previous name contributed to confusion among patients and even delayed diagnosis in some cases.
The new term PMOS is intended to reflect the broader endocrine and metabolic nature of the condition.
What PMOS Is—and What It Affects
PMOS is a hormonal disorder that can influence:
- Reproductive health
- Metabolism and weight regulation
- Skin and hair changes
- Mental health and mood
It is also linked to metabolic syndrome, a cluster of conditions that increases the risk of Type 2 diabetes, heart disease, and stroke.
Experts say the exact cause is still unknown, though genetics and metabolic factors—including insulin resistance—are believed to play a significant role.
Symptoms Can Vary Widely
One reason the condition is often underdiagnosed is the wide variation in symptoms.
Common signs include:
- Irregular menstrual cycles
- Elevated androgen levels (male-type hormones)
- Acne or excess facial/body hair growth
- Thinning scalp hair
- Ovarian follicle changes (not always cysts)
Doctors note that not all symptoms must be present for a diagnosis, particularly in adolescents, where specific hormonal and cycle patterns are considered key indicators.
Fertility and Pregnancy Risks
PMOS is one of the most common causes of infertility due to irregular or absent ovulation.
It can also increase the risk of pregnancy complications such as:
- Gestational diabetes
- Preterm birth
However, specialists emphasize that many people with the condition are still able to conceive and have healthy pregnancies with appropriate care.
Treatment Focuses on Individualized Care
There is no single cure for PMOS, but symptoms can be managed effectively.
Treatment options include:
- Lifestyle changes such as diet, exercise, and sleep improvements
- Metformin to improve insulin sensitivity
- Hormonal contraceptives to regulate cycles
- Medications that reduce androgen effects
Clinicians stress that treatment should be tailored to each patient’s goals, whether that involves fertility support, symptom control, or metabolic health management.
Why the Name Change Matters for Care
Medical experts say renaming the condition is not just symbolic—it is intended to improve healthcare outcomes.
By recognizing PMOS as a broader endocrine disorder rather than an ovarian condition alone, doctors hope to:
- Reduce misdiagnosis
- Improve awareness among clinicians
- Encourage earlier intervention
- Better align treatment with metabolic and hormonal causes
Dr. Cree and other researchers involved in the update say the goal is to shift both medical understanding and patient care toward a more accurate, holistic approach.
A Long-Evolving Understanding of the Condition
The renaming reflects years of evolving research into how hormonal and metabolic systems interact in the body.
Experts say greater clarity in terminology could help patients receive faster diagnoses and more effective treatment, particularly as awareness of insulin resistance and endocrine disorders continues to grow.
While the name has changed, researchers emphasize that the underlying condition—and the need for ongoing care—remains the same