PMOS/PCOS

Polycystic ovary syndrome (PCOS), also known as polyendocrine metabolic ovarian syndrome (PMOS), is one of the most common hormonal disorders affecting women of reproductive age. Learn about symptoms, causes, diagnosis, hormone testing, and the laboratory panels available through MDL to support diagnosis and long-term management.

What Is PMOS/PCOS?

PMOS/PCOS, polycystic ovary syndrome, is one of the most common hormone conditions in women. It happens when a woman’s hormones become unbalanced, which can affect her periods, skin and hair, weight, and ability to get pregnant. It is a lifelong condition, but with good information and the right care, it can be managed well.

In 2026, doctors and patient groups around the world agreed on a newer name, polyendocrine metabolic ovarian syndrome (PMOS), to better reflect the condition's impact beyond the ovaries. Most women with the condition do not actually have harmful cysts on their ovaries, and the condition affects far more than just the ovaries. While this change settles in, both names will often be used together as PMOS/PCOS, making the condition easy to recognize.

You Are Not Alone

PMOS/PCOS affects about 1 in 8 women, roughly 170 million worldwide. Many women live with it for years before getting a diagnosis, because the signs can be easy to miss or mistaken for something else. Getting clear answers is a woman’s first step toward feeling better and taking charge of her health.

Condition At A Glance

Quick Facts About PMOS/PCOS

Also Called

Polycystic Ovary Syndrome (PCOS), Polyendocrine Metabolic Ovarian Syndrome (PMOS)

Estimated Prevalence

Approximately 1 in 8 women of reproductive age

Most Common Age at Diagnosis

Teens through the 30s, although symptoms may begin earlier or persist after menopause

Body Systems Affected

Reproductive, endocrine, metabolic, cardiovascular, dermatologic

May Affect

Ovulation, fertility, menstrual cycles, insulin sensitivity, cholesterol, weight, skin and hair health

Role of Laboratory Testing

Evaluates reproductive hormones, androgen levels, thyroid function, metabolic markers, and helps exclude other causes of similar symptoms

PMOS/PCOS comes down to a few key parts of how the body works. Understanding them can make test results easier to follow.

Scroll the table horizontally to compare all columns.

What Causes It?

The exact cause is not fully understood, and it often runs in families. Two things are usually involved:

• Higher levels of androgens. These are hormones that everyone makes, but in higher amounts, they can affect the skin, hair, and periods.
• How the body handles insulin. Insulin is the hormone that manages blood sugar. Many women with PMOS/PCOS have “insulin resistance,” which can make symptoms stronger and, over time, affect other parts of a woman’s health.
• Genetics and family history. PMOS/PCOS often runs in families, suggesting that inherited genes can increase a person's likelihood of developing the condition. However, genetics alone do not determine whether someone will develop PMOS/PCOS.
• Chronic low-grade inflammation. Many women with PMOS/PCOS have ongoing, low-grade inflammation that may contribute to hormone imbalances and insulin resistance, potentially worsening symptoms over time.
• Environmental and lifestyle influences. Factors such as diet, physical activity, sleep, chronic stress, and exposure to certain environmental chemicals may influence how PMOS/PCOS develops and how severe its symptoms become, particularly in people with a genetic predisposition.

Common Signs and Symptoms

Symptoms vary widely from one woman to the next. They may notice several, or only one or two. The most common include:

• Irregular, missed, or unpredictable periods
• Difficulty getting pregnant
• Extra hair growth on the face, chest, or stomach
• Acne or oily skin
• Thinning hair on the scalp
• Weight gain, or difficulty losing weight
• Darkened patches of skin, often on the neck or underarms
• Skin tags
• Feeling anxious or low, or struggling with body image
• Ovarian cysts seen on ultrasound (not present in every patient)

Having some of these signs does not automatically mean a woman has PMOS/PCOS - but it is a good reason to talk with a doctor.

How Is It Diagnosed?

There is no single test for PMOS/PCOS. Instead, doctors use a well-established guide called the Rotterdam criteria. A diagnosis is made when at least two of these three signs are present:

• Irregular ovulation - usually noticed as irregular or missing periods.
• Signs of higher androgen levels - such as extra hair growth or acne, or a blood test that shows raised levels.
• Many small follicles on the ovaries - seen on an ultrasound, or, in adults, measured with a blood test called AMH.

Before confirming the diagnosis, a doctor will also check a few other hormones, such as thyroid or adrenal disorders, to make sure another condition is not causing the symptoms.

Why Laboratory Testing Matters

Laboratory testing plays an important role in evaluating PMOS/PCOS because many other conditions can produce similar symptoms.

Depending on your symptoms and medical history, your healthcare provider may recommend laboratory testing to evaluate:

• Testosterone and other androgen hormones
• Luteinizing hormone (LH)
• Follicle-stimulating hormone (FSH)
• Estradiol
• Progesterone
• Prolactin
• Thyroid function (TSH, Free T4, and other tests as appropriate)
• Glucose metabolism and insulin resistance
• Lipid profile
• Additional hormone or metabolic markers based on your clinical presentation

Laboratory results help your healthcare provider understand your hormone profile, identify contributing factors, rule out other endocrine disorders, and develop an individualized treatment plan.

Understanding Your Hormones

Your Hormones Work Together. Your brain, ovaries, and metabolism are connected in a delicate balance. When one is out of balance, it can affect the others.

Brain: Hypothalamus & Pituitary

The master control center. It sends hormone signals that regulate your ovaries and metabolism. Key Signals: GnRH, FSH, LH.

Ovaries: The Hormone Producers

Produces key hormones that regulate your reproductive health and influence your metabolism. Key Hormones: Estrogen, Progesterone, Androgens.

Metabolism: Energy & Balance

Hormones from your ovaries affect how your body processes energy, sugar, and fat. Key Factors: Insulin, Glucose, Weight Management.

Why Testing and Follow-Up Matter

PMOS/PCOS is very manageable, but because it can affect blood sugar, heart health, and fertility over time, regular check-ups and lab tests help physicians stay one step ahead. Tracking hormone and metabolic levels makes it easier to choose the right care and to see what is working. The goal is simple: more answers, fewer surprises, and a plan that fits a woman’s life.

MDL’s PMOS/PCOS Testing Panels

MDL offers two blood test panels to support care. A doctor will help you decide which one is right for each patient.

Comprehensive PMOS/PCOS Panel (Test No. 649). A complete set of tests that helps a doctor diagnose the condition and get a full picture of hormone and metabolic health. It looks at:

• Hormone levels - testosterone and related hormones that show androgen activity.
• Ovary and cycle hormones - including LH, FSH, estrogen, AMH, and prolactin, which relate to ovulation and the menstrual cycle.
• Blood sugar and metabolic health - such as insulin, glucose, HbA1c, and cholesterol.
• Thyroid - to rule out other conditions that can look similar.

Core PMOS/PCOS Panel (Test No. 690). A smaller, focused set of tests for women who already have a diagnosis and want to keep an eye on things over time. It tracks the essentials:

• Key hormone levels - to follow androgen levels and how treatment is working.
• Blood sugar and metabolic markers - insulin, glucose, a measure of insulin resistance and cholesterol.
• Thyroid - checked periodically as part of overall monitoring.

Looking for PMOS/PCOS testing? Ask your healthcare provider about MDL's Comprehensive PMOS/PCOS Panel (Test No. 649) or Core PMOS/PCOS Monitoring Panel (Test No. 690) to help support diagnosis and ongoing management.

PMOS/PCOS Myth vs. Fact

Separating Common Misconceptions from the Facts

PMOS/PCOS is one of the most misunderstood hormone disorders affecting women. Here are some common myths and the facts behind them.

Myth

"Everyone with PMOS/PCOS has ovarian cysts."

Fact

Despite its name, many women diagnosed with PMOS/PCOS do not have ovarian cysts. Likewise, having ovarian cysts does not necessarily mean someone has PMOS/PCOS. Healthcare providers diagnose PMOS/PCOS using a combination of your medical history, symptoms, physical examination, laboratory testing, and, when appropriate, imaging studies.

Myth

"Only women who are overweight develop PMOS/PCOS."

Fact

Women of all body sizes can develop PMOS/PCOS. Although excess weight and insulin resistance are common in PMOS/PCOS, many women with a healthy body weight also have the condition. These women may still experience irregular periods, elevated androgen levels, acne, fertility challenges, or other symptoms.

Myth

"If my periods are regular, I can't have PMOS/PCOS."

Fact

While irregular menstrual cycles are common in PMOS/PCOS, some women continue to have regular periods and still meet the diagnostic criteria based on other clinical findings. Every woman's hormone profile is different, which is why a comprehensive medical evaluation is important.

Myth

"PMOS/PCOS only affects fertility."

Fact

PMOS/PCOS is much more than a reproductive condition. It can also affect:

• Metabolic health
• Blood sugar regulation
• Cholesterol levels
• Cardiovascular health
• Sleep
• Mental well-being
• Skin and hair health

Because PMOS/PCOS can affect multiple body systems, ongoing medical care is important throughout adulthood.

Myth

"If I'm not trying to get pregnant, PMOS/PCOS doesn't need treatment."

Fact

Treatment is not only about fertility. Managing PMOS/PCOS may help regulate menstrual cycles, improve symptoms, support metabolic health, and reduce the risk of long-term complications such as type 2 diabetes, cardiovascular disease, and endometrial abnormalities. Your healthcare provider can recommend an individualized treatment plan based on your symptoms, health goals, and stage of life.

Myth

"PMOS/PCOS goes away after menopause."

Fact

Although menstrual periods stop after menopause, the hormonal and metabolic effects associated with PMOS/PCOS may continue. Women with PMOS/PCOS may still benefit from ongoing monitoring of cardiovascular health, blood sugar, cholesterol, and other aspects of long-term wellness.

Myth

"A single blood test can diagnose PMOS/PCOS."

Fact

There is no single laboratory test that confirms PMOS/PCOS. Healthcare providers evaluate a combination of:

• Your symptoms
• Medical history
• Physical examination
• Hormone testing
• Metabolic testing
• Imaging studies, when appropriate

Laboratory testing is an important part of the evaluation because it helps assess hormone levels and rule out other conditions that may cause similar symptoms.

Myth

"Nothing can be done to manage PMOS/PCOS."

Fact

Although there is currently no cure for PMOS/PCOS, many women successfully manage their symptoms through a combination of healthy lifestyle habits, medications when appropriate, and regular medical follow-up. Early diagnosis and individualized care can improve quality of life and support long-term health.

Get the Answers You Need

If you have symptoms that may be related to PMOS/PCOS, talk with your healthcare provider about whether laboratory testing is appropriate for you. MDL's comprehensive endocrinology testing helps support accurate diagnosis, individualized treatment planning, and ongoing management.

Related Hormone Conditions

• Primary Ovarian Insufficiency
• Endometriosis
• Menopause
• Thyroid Disorders

Frequently Asked Questions

Sources

The information on this page is intended for general education only and should not replace professional medical advice. It is based on guidance from leading medical and research organizations, including:

• Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. [Teede HJ et al. (2023). J Clin Endocrinol Metab 108, 2447-2469].
• The Rotterdam ESHRE/ASRM consensus on diagnosis (2004), which established the criteria still used today [Fertil Steril 2004, 81, 19-25].
• The 2026 global consensus that introduced the new name, Polyendocrine Metabolic Ovarian Syndrome (PMOS). [Teed HJ et al. (2026). Lancet 407 2329-2339].
• The Androgen Excess and PCOS Society (AE-PCOS - https://aepmostsociety.org).