Polyendocrine Metabolic Ovarian Syndrome: Symptoms, Diagnosis and Treatment

Polyendocrine metabolic ovarian syndrome (PMOS) affects up to 1 in 10 women of reproductive age, yet many women struggle for years to get an accurate diagnosis. That’s because PMOS is not one disease. It’s a syndrome: a constellation of hormonal and metabolic symptoms.

Maybe you’ve skipped periods, battled acne well beyond your teen years or tried diet after diet only to gain weight. Or maybe you’ve tried to get pregnant for more than a year during your prime child-bearing years without success.

“What I want women to understand is that PMOS is not a simple, clear-cut diagnosis,” said Jessica Chan, MD, a reproductive endocrinologist at Cedars-Sinai. “It’s a highly variable hormonal and metabolic condition that requires thoughtful evaluation and individualized care.”

{{cta-block}}

What Is PMOS?

Formerly known as polycystic ovarian syndrome (PCOS), PMOS is a complex, lifelong hormonal and metabolic condition. In 2026, an international consensus process renamed PCOS as PMOS to underscore that the condition is not defined by ovarian cysts.

PMOS is characterized by a group of features that occur together. Researchers believe genetics, environmental factors and metabolic issues all play a role in the condition. But despite its former name, a PMOS diagnosis does not mean your ovaries are bursting with cysts.

“Those ‘cysts’ are actually immature follicles—tiny, fluid-filled sacs that hold eggs,” said Chan. “In PMOS, disrupted hormonal signals cause those follicles to stall instead of maturing and releasing an egg.”

PMOS is closely linked to insulin resistance. High insulin levels can stimulate the ovaries to produce more testosterone, which disrupts ovulation and fuels many PMOS symptoms.

{{providers}}

What Are the Symptoms of PMOS?

Beyond the cysts of its former moniker, PCOS, PMOS shows up differently in each person. Some people experience only mild hormonal changes. Others struggle with multiple overlapping issues.

Common symptoms include:

• Irregular or missed periods (menstrual cycle shorter than 22 days or longer than 34-35 days)
• Infertility (because infrequent ovulation can make conception more challenging)
• Acne on the face, chest or back
• Excess facial or body hair
• Thinning scalp hair
• Weight gain, especially around the abdomen
• Darkened, velvety skin in body folds (acanthosis nigricans), a sign of insulin resistance

“Not everyone with PMOS struggles with their weight or infertility. And not every woman with PMOS has irregular periods,” said Chan. “That’s why a thorough medical history, physical exam and lab work are so important.”

PMOS is a chronic condition. But with the right tests and an individualized plan, most people with PMOS can manage their symptoms, protect their long-term health and—when they choose to—pursue pregnancy successfully.

How Do Doctors Diagnose PMOS?

There is no single blood test for diagnosing PMOS. Instead, clinicians rely on a detailed medical and menstrual history, a physical exam, blood tests and a complete metabolic screening to make a diagnosis. Doctors may also order a pelvic ultrasound to look for multiple follicles on the ovaries.

PMOS-like symptoms happen in other conditions, too, including thyroid disease, Cushing syndrome and adrenal disorders. That’s why women with PMOS see an average of three providers before learning they have PMOS.

“PMOS is really a diagnosis of exclusion,” said Chan. “If a patient is experiencing irregular periods and high androgen levels and they have multiple follicles on their ovaries—and other conditions have been ruled out—then we can make the diagnosis.”

What Are the Health Risks of PMOS?

PMOS is associated with several long-term health risks, including:

• Type 2 diabetes
• Obesity
• Increased cardiovascular risks, including high blood pressure and high cholesterol
• Endometrial hyperplasia, when the endometrium (the lining of the uterus) becomes too thick, increasing the risk of endometrial cancer

“Women with PMOS also have significantly higher rates of depression and anxiety compared to the general population,” said Chan.

Treatments for PMOS

There is no cure for PMOS, and there currently are no FDA-approved treatments for the condition. However, depending on your life stage and goals, doctors have many effective strategies to help manage PMOS symptoms.

• ‍For infertility: Medications such as letrozole or clomiphene can help stimulate egg release and increase the chances of pregnancy. ‍
• For insulin resistance and weight gain: Metformin, a medication used to treat Type 2 diabetes, can help improve insulin sensitivity. Weight loss medications, including GLP-1 drugs, that target insulin pathways may also help alleviate symptoms.  ‍
• For irregular menstrual cycles, acne and facial hair: Combined hormonal birth control pills can help regulate menstrual cycles and improve symptoms such as acne and unwanted hair growth.

Lifestyle strategies can also make a meaningful difference. Patients can support their metabolic health with:

• A whole-foods diet rich in vegetables, high-fiber carbohydrates and lean protein
• Regular physical activity
• Adequate sleep
• Proper stress management

When to Get Help for PMOS

PMOS can happen to anyone who has a uterus at any time after puberty. It affects all races and ethnicities, though women who have a mother or sister with PMOS may be at higher risk.

“Adolescents naturally have irregular cycles,” said Chan. “But if you’re more than two to three years out from your first period and your cycles are still irregular, it’s time to talk to your doctor.”

If symptoms persist, it’s important to advocate for yourself. Many people with PMOS report feeling dismissed or being told to “lose weight.” That advice can be harmful, especially for women who face insulin resistance, which makes weight loss a tremendous challenge.

“PMOS is a chronic condition,” Chan said. “But with the right tests and an individualized plan, most people with PMOS can manage their symptoms, protect their long-term health and—when they choose to—pursue pregnancy successfully.”