Maybe your periods have always been irregular. Maybe it’s acne that never cleared up, hair growing where you don’t want it, or a year of trying to get pregnant without success. Somewhere along the way, someone mentioned PCOS. And now you may be hearing a new name for it: PMOS.
The quick answer: PMOS, or polyendocrine metabolic ovarian syndrome, is the new name for PCOS (polycystic ovary syndrome). It is the same condition. It was renamed in 2026 because it isn’t caused by cysts. It’s a hormone and metabolic condition that affects ovulation, blood sugar and long-term health. It’s diagnosed with symptoms, bloodwork and ultrasound together, never by ultrasound alone.
PCOS is one of the most common hormone conditions in women, affecting about 1 in 10 women of reproductive age. It is also one of the most often missed, and one of the most often misdiagnosed. This article explains what it is, why it was renamed, how to know if you might have it, how it should be diagnosed, and why the diagnosis matters for your long-term health, not just your cycle. It’s the foundation of our PCOS care in Los Angeles.
PCOS vs. PMOS: What Changed and What Didn’t
In May 2026, after a 14-year international process involving 56 medical and patient organizations, PCOS was officially renamed polyendocrine metabolic ovarian syndrome (PMOS). The American Society for Reproductive Medicine, a leading U.S. fertility medicine organization, has endorsed the change.
The old name suggested the condition is defined by cysts on the ovaries. It isn’t. What shows up on an ultrasound are follicles, tiny fluid-filled sacs that each hold a developing egg. In PCOS, many follicles start to grow but stop before releasing an egg. They aren’t true cysts.
The new name describes the condition more accurately:
- Polyendocrine: “endocrine” refers to the body’s hormone system, so this means several hormone systems are involved, not just one.
- Metabolic: metabolism is how your body uses and stores energy. PCOS affects blood sugar, insulin, weight and heart health.
- Ovarian: the ovaries are still involved, through ovulation and follicle development.
What didn’t change: if you’ve already been diagnosed with PCOS, your diagnosis still stands. PCOS and PMOS are the same condition, with the same diagnosis and the same treatments. You’ll see both names on medical records, lab reports and insurance forms during a transition period through 2028. In this article, we use both.
The new name also supports how Dr. Kim has always approached diagnosis. If cysts never defined the condition, an ultrasound showing follicles was never enough to diagnose it.
What Is PCOS (PMOS)?
PCOS is a hormonal imbalance. Every woman makes both “female” hormones, like estrogen and progesterone, and small amounts of “male” hormones called androgens, like testosterone. In PCOS, androgens run higher than they should. That imbalance disrupts ovulation, the monthly release of an egg from the ovary.
PCOS is also closely tied to insulin resistance. Insulin is the hormone that moves sugar from your blood into your cells for energy. With insulin resistance, the body doesn’t respond to insulin well, so it has to make more of it. Those high insulin levels push androgens even higher. Insulin resistance affects many women with PCOS who are not overweight.
PMOS Symptoms: How Do You Know If You Have PCOS?
When ovulation becomes irregular, a chain of symptoms can follow:
- Irregular, infrequent or missed periods, such as fewer than eight periods a year or cycles longer than 35 days
- Acne, especially along the jawline
- Excess hair growth on the face, chest or abdomen
- Thinning hair on the scalp
- Weight gain or difficulty losing weight, often around the waist
- Difficulty getting pregnant
You don’t need every symptom. Many women have only two or three, and some have very few. If irregular periods come together with acne, unwanted hair or trouble getting pregnant, it’s worth being evaluated.
But no checklist can tell you whether you have PCOS. A thyroid problem, high prolactin (a hormone made by a gland in the brain), and other hormone conditions can cause the same symptoms. Symptoms are a reason to be evaluated. They are not a diagnosis.
PCOS Belly, Weight Gain and Hair Loss
These are three of the most frustrating symptoms, and they all trace back to the same hormones.
- “PCOS belly” and weight gain. Insulin resistance makes the body more likely to store fat around the waist and makes weight harder to lose, even with the same diet and exercise that work for others. That isn’t a lack of willpower. Treating insulin resistance, sometimes with medications like GLP-1s, often makes weight easier to manage.
- Hair loss on the scalp. Higher androgens can thin hair on the top of the head, usually at the part, while causing more hair on the face and body. Lowering androgens with medication can slow or stop the thinning.
- Unwanted hair and acne. These come from the same excess androgens. They often improve with treatment over several months.
Why Everyone Seems to Be Talking About PCOS
PCOS has become a major topic on social media, podcasts and wellness sites, and the renaming brought another wave of attention. Much of that has been good: many women finally recognized their own symptoms and asked for help.
The downside is that PCOS is now often self-diagnosed from a symptom checklist, or blamed for everything from fatigue to bloating. Supplements and “PCOS diets” are sold with big promises and little evidence. And because several other conditions cause the same symptoms, a woman who assumes she has PCOS may be missing something else entirely.
Why an Accurate Diagnosis Matters
- The right treatment. If your symptoms come from a thyroid problem, PCOS treatment won’t fix it.
- Long-term health. A confirmed diagnosis means regular screening for diabetes and heart-health risks, which can be part of your annual well-woman exam.
- Fertility planning. Knowing early gives you more options and more time. A preconception visit is a good place to start.
- Peace of mind. Many women spend years wondering what’s wrong. A clear answer ends that.
How PCOS Is Diagnosed (and How to Test for PMOS)
The most common way PCOS gets diagnosed is also the least reliable: an ultrasound shows many small follicles, and the patient leaves with a diagnosis. That’s not how the official guideline works.
The current global standard is the 2023 International Evidence-based Guideline for PCOS, a set of recommendations written by international experts after reviewing the available research. Under this guideline, PCOS is diagnosed in adults when two of these three features are present:
- Irregular or absent ovulation, usually seen as irregular periods
- Excess androgens, seen in symptoms like acne and unwanted hair, or measured in bloodwork
- Polycystic ovaries, meaning ovaries with an unusually high number of follicles, seen on ultrasound or reflected by a high level of a blood hormone called AMH (explained below)
Other conditions that can look like PCOS must be ruled out first. PCOS is a diagnosis you reach after checking for everything else.
Why ultrasound alone isn’t enough
Polycystic-appearing ovaries are only one of the three features, so an ultrasound can never make the diagnosis by itself. Many follicles on an ultrasound also isn’t a reliable sign of PCOS on its own. Plenty of healthy women, especially in their teens and twenties, naturally have ovaries with lots of follicles and no hormonal problem at all. For that reason, the guideline doesn’t use ultrasound or AMH to diagnose PCOS until at least eight years after a girl’s first period.
A woman with irregular periods and high androgens already meets the criteria, whatever her ultrasound shows. A woman with a “polycystic” ultrasound but regular cycles and normal hormones usually doesn’t have PCOS. Bloodwork is what tells them apart.
That doesn’t mean ultrasound isn’t useful. It’s part of every evaluation we do. It just isn’t the whole answer.
The bloodwork we use, and why
Measuring androgens. The guideline recommends confirming excess androgens with blood tests, because acne and hair growth vary widely from person to person.
- Free testosterone. Most testosterone in the blood is attached to a protein and inactive. Free testosterone is the small portion that isn’t attached and can actually act on your body. It’s the most useful single marker, and it can be high even when your total testosterone looks normal.
- SHBG (sex hormone–binding globulin). This is the protein that attaches to testosterone and keeps it inactive. When SHBG is low, which is common with insulin resistance, more testosterone is left free to act. We use it to interpret your testosterone result.
- Androstenedione and DHEA-S. These are two other androgens. The guideline recognizes them as additional markers, especially when testosterone is normal but symptoms are present. DHEA-S is made mostly by the adrenal glands, small glands that sit on top of the kidneys. It helps show whether extra androgens are coming from the adrenal glands or the ovaries. A very high level can point to a different problem that needs its own workup. Dr. Kim checks these alongside testosterone so the full picture is available from a single blood draw.
Looking at the ovaries. Dr. Kim performs a pelvic ultrasound in our office as part of the evaluation. This imaging test uses sound waves to see the ovaries, uterus and other pelvic organs. It shows the ovaries and follicles directly. It also checks the lining of the uterus, which matters when periods have been irregular for a long time.
Alongside the ultrasound, we measure AMH (anti-Müllerian hormone). AMH is produced by developing follicles, so it runs high when the ovaries hold many of them. Together, the ultrasound and AMH give a fuller picture of the ovaries than either one alone. Neither can diagnose PCOS without the hormone results.
Ruling out look-alikes. TSH (thyroid-stimulating hormone) and free T4 (the main thyroid hormone) show how well your thyroid is working. The thyroid is a gland in your neck that controls how fast your body uses energy. An underactive or overactive thyroid can cause irregular periods, weight changes and hair changes that mimic PCOS, and it needs completely different treatment.
Checking metabolic health. Hemoglobin A1c, often just called A1c, measures your average blood sugar over the past three months. It isn’t part of the PCOS diagnosis, but it matters from day one. The guideline recommends every woman with PCOS be checked for prediabetes, blood sugar that is higher than normal but not yet in the diabetes range, and for diabetes, regardless of her weight. This is the “metabolic” in the new name.
Blood is drawn at the lab in the building next door to our office, so your ultrasound and bloodwork can be done on the same visit.
One practical note: birth control pills lower androgens and raise SHBG, which can hide PCOS in bloodwork. If you take hormonal birth control, Dr. Kim may recommend pausing it before testing.
How PCOS Is Treated
There’s no single cure, but PCOS is very treatable. The plan depends on your symptoms and your goals, especially whether you want to get pregnant now. Options Dr. Kim may recommend include:
- Birth control pills. They regulate periods, lower androgens, improve acne and unwanted hair, and protect the lining of the uterus.
- Anti-androgen medication. These medicines block the effects of androgens on the skin and hair follicles, which helps with unwanted hair growth, acne and scalp hair thinning.
- GLP-1 medications. This is the same family of medications as Ozempic and Wegovy. They help the body manage blood sugar and reduce appetite. For women with insulin resistance or weight concerns, they can improve metabolic health and weight, which can help restore more regular cycles. Dr. Kim prescribes and monitors them, and they need to be stopped before trying to get pregnant. Learn more about medical weight management at Yunella and read our guide to GLP-1 medications.
- Ovulation induction with letrozole. Ovulation induction means using medication to help the ovaries release an egg. Letrozole is an oral pill that is the most common first choice for women with PCOS who are trying to conceive. Dr. Kim manages ovulation induction in our office, and when needed, IUI as well. See our fertility care.
- Lifestyle support. Changes to nutrition, activity and sleep help the body respond better to insulin and can improve symptoms. They work best alongside medical care.
What Happens If PCOS Goes Untreated
PCOS affects far more than periods and skin. Left untreated, it can lead to:
- Type 2 diabetes. Women with PCOS develop diabetes at higher rates and at younger ages.
- Heart and metabolic risks, including high cholesterol, high blood pressure, and fatty liver disease, a buildup of fat in the liver that can cause damage over time.
- Problems with the lining of the uterus. Normally the lining builds up each month and sheds as a period. Without regular ovulation, it can keep building without shedding. Over time this can cause endometrial hyperplasia, an overgrowth of the lining that raises the risk of endometrial cancer, cancer of the uterine lining.
- Infertility. Because PCOS interferes with ovulation, it’s one of the most common causes of trouble getting pregnant. It’s also one of the most treatable.
- Pregnancy complications, including gestational diabetes (diabetes that develops during pregnancy) and high blood pressure during pregnancy. Read more in our guide to high-risk pregnancy.
- Sleep apnea, anxiety and depression. Sleep apnea is a condition where breathing repeatedly stops and starts during sleep. All three are more common with PCOS.
With a correct diagnosis and ongoing care, most of these risks can be significantly reduced.
Frequently Asked Questions
What is PMOS? PMOS stands for polyendocrine metabolic ovarian syndrome. It’s the new name for PCOS, adopted in 2026 because the condition is a hormone and metabolic disorder, not a disease of ovarian cysts.
Is PMOS a different condition from PCOS? No. It’s the same condition with a more accurate name. An existing PCOS diagnosis carries over.
How do I know if I have PMOS? The most common signs are irregular periods, acne, unwanted hair growth, scalp hair thinning, weight gain around the waist, and trouble getting pregnant. But other conditions cause the same symptoms, so only an evaluation with bloodwork and an ultrasound can confirm it.
How do you test for PCOS or PMOS? With a combination of your symptoms and menstrual history, blood tests for androgens (free testosterone, SHBG, DHEA-S and androstenedione), AMH, thyroid tests and A1c, and a pelvic ultrasound. At Yunella, the ultrasound is done in the office and blood is drawn next door, on the same visit.
Can an ultrasound diagnose PCOS? Not on its own. Ultrasound is an important part of the evaluation, but it has to be read together with your symptoms and bloodwork.
Is PCOS genetic? It tends to run in families. If your mother or sister has PCOS, your chances are higher. There’s no single PCOS gene, though. Genes, insulin resistance and environment all play a part.
Can PCOS go away? Is it curable? There’s no cure, but symptoms can be well controlled with treatment, and some improve with age. Periods often become more regular as women approach their forties. The metabolic risks, like diabetes and heart disease, don’t go away, which is why ongoing screening matters.
Do I need to be overweight to have PCOS? No. Many women with PCOS are not overweight, and insulin resistance can still be present.
Can I get pregnant with PCOS? Yes. Many women with PCOS conceive, often with help like ovulation induction with letrozole.
Do I need a PCOS specialist? Most women with PCOS can be diagnosed and treated by an OB-GYN who follows the current guideline. That covers the hormone workup, ultrasound, medication and fertility treatment. A referral to an endocrinologist or fertility specialist is added when something more complex turns up. At Yunella, Dr. Kim handles the full evaluation, treatment and ovulation induction in one place.
I was diagnosed years ago with just an ultrasound. Should I be re-evaluated? It’s worth a conversation. A full hormone workup confirms the diagnosis and checks your metabolic health.
PCOS and PMOS Care at Yunella
If you have irregular periods, acne, unwanted hair growth, or trouble getting pregnant, or if you were told you have PCOS based only on an ultrasound, a proper evaluation is worth it. Our PCOS care includes a thorough visit with Dr. Kim, a complete hormone workup, in-office ultrasound, and a treatment plan built around your goals. Hear from our patients in their own words in our patient films.
Call 424-404-8832 or request an appointment to schedule a visit.
Medically reviewed by David Seil Kim, MD, PhD, FACOG · Last reviewed: [October 15th, 2026]
This article is for education and does not replace individualized medical advice.
This article is for education and does not replace individualized medical advice.