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Polyendocrine Metabolic Ovarian Syndrome, or PMOS, is the new name for the condition historically known as Polycystic Ovary Syndrome, or PCOS. The updated name reflects an important fact: this is not simply an ovarian condition or a problem caused by ovarian “cysts.” It is a complex, long-term hormonal and metabolic pattern that may affect menstrual cycles, ovulation, androgen levels, fertility, glucose regulation, cholesterol, skin, hair, energy, weight, and emotional well-being.
The Endocrine Society announced the new PMOS name on May 12, 2026, following an international process involving patients, clinicians, researchers, and professional organizations. During the transition, patient education should use “PMOS, formerly PCOS” so people recognize both names.
Lab testing can provide valuable information about the hormonal and metabolic patterns associated with PMOS. However, there is no single PMOS blood test, and blood testing alone cannot confirm or exclude the condition. Evaluation may include medical history, symptoms, physical examination, laboratory results, and, in some cases, pelvic ultrasound.
Ulta Lab Tests provides direct access to many relevant laboratory tests where available. Testing can help patients gather objective health information to discuss with a qualified healthcare provider. Lab testing is educational and informational and does not replace professional medical advice, diagnosis, imaging, or treatment.
PMOS is a hormonal and metabolic disorder that may affect ovarian function, menstrual cycles, androgen production, glucose regulation, and long-term cardiometabolic health.
Androgens are hormones that include testosterone and related compounds. Everyone produces androgens, but higher-than-expected levels or increased tissue sensitivity to them may contribute to excess facial or body hair, persistent acne, or scalp hair thinning.
PMOS may also interfere with ovulation. Some people have infrequent periods, unpredictable cycles, or long gaps between periods. Others may have apparently regular cycles but still experience inconsistent ovulation.
Current international guidance generally supports an adult diagnosis when at least two of the following three features are present after other possible causes have been considered:
A person does not need to have all three features. A person also does not need to have ovarian cysts in the usual medical meaning of the word. The ovarian appearance associated with PMOS involves the number and distribution of developing follicles rather than harmful or abnormal cysts.
Yes. Irregular cycles and acne can be common during normal puberty, making evaluation more complicated. In adolescents, both ovulatory dysfunction and clinical or biochemical androgen excess are generally required. Ovarian ultrasound and anti-Müllerian hormone testing are not currently recommended for diagnosing adolescents because they may increase the risk of overdiagnosis.
Answer: PMOS is not diagnosed by one hormone level or by finding ovarian “cysts.” It is identified through a combined assessment of menstrual and ovulatory function, androgen-related findings, ovarian morphology when appropriate, and the exclusion of other conditions.
PMOS may first appear to be a reproductive or menstrual concern, but its effects can extend well beyond the ovaries.
Possible reproductive and hormonal effects include:
Ovulation may occasionally be inconsistent even when menstrual cycles appear regular. When confirmation is clinically needed, a properly timed Progesterone Test may help determine whether ovulation has occurred.
Insulin resistance is an important biological feature of PMOS. Insulin helps glucose move from the bloodstream into cells. When cells respond less effectively, the body may produce more insulin to maintain normal blood glucose.
Glucose abnormalities can occur in people with PMOS regardless of age or body mass index. Current international guidance recommends assessing glycemic status when PMOS is identified and periodically afterward based on individual risk factors.
PMOS may be associated with elevated triglycerides, low HDL cholesterol, higher LDL cholesterol, high blood pressure, impaired glucose tolerance, and other cardiometabolic risk factors.
Current guidance recommends obtaining a Lipid Panel Test at diagnosis regardless of age or BMI. The timing of future lipid testing depends on the initial results and the person’s broader cardiovascular risk profile.
Long periods without ovulation may expose the uterine lining to prolonged estrogen stimulation without regular progesterone exposure. PMOS is associated with an increased risk of endometrial hyperplasia, although the overall likelihood of endometrial cancer remains low and routine cancer screening solely because of PMOS is not generally recommended.
People who have prolonged gaps between periods or unusual bleeding should discuss these symptoms promptly with a healthcare provider.
PMOS may also be associated with depression, anxiety, body-image concerns, eating disorders, and sleep apnea. Fatigue may come from several overlapping causes, including sleep disruption, glucose dysregulation, iron deficiency, thyroid disease, low vitamin B12, low vitamin D, or emotional strain. Symptoms should not automatically be attributed to PMOS without appropriate evaluation.
| Symptom or concern | What it may suggest | Lab tests that may provide more information |
|---|---|---|
| Irregular, infrequent, or absent periods | Inconsistent ovulation, pregnancy, thyroid dysfunction, elevated prolactin, or another hormonal condition | hCG Pregnancy Test, TSH Test, Prolactin Test, Total Testosterone Test, SHBG Test, 17-Hydroxyprogesterone Test, and Progesterone Test |
| Excess facial or body hair | Clinical androgen excess | Total Testosterone Test, Free Testosterone Test, SHBG Test, DHEA-S Test, and Androstenedione Test |
| Persistent acne | Possible androgen activity, although acne alone is not specific to PMOS | Total Testosterone Test, Free Testosterone Test, SHBG Test, and DHEA-S Test when appropriate |
| Scalp hair thinning | Androgen activity, thyroid dysfunction, iron deficiency, nutritional concerns, or another cause | Total Testosterone Test, SHBG Test, TSH Test, CBC Test, Ferritin Test, Iron and TIBC Test, and Vitamin D Test |
| Difficulty becoming pregnant | Inconsistent ovulation or another reproductive factor | Progesterone Test, TSH Test, Prolactin Test, and clinician-directed fertility evaluation |
| Weight-loss resistance or abdominal weight gain | Possible metabolic strain, although these symptoms have many possible causes | 75-g Oral Glucose Tolerance Test, Fasting Glucose Test, Hemoglobin A1C Test, Lipid Panel Test, Comprehensive Metabolic Panel, and TSH Test |
| Fatigue or poor recovery | Glucose changes, anemia, low iron, thyroid dysfunction, nutrient deficiency, sleep problems, or another condition | CBC Test, Ferritin Test, Iron and TIBC Test, Vitamin B12 Test, Folate Test, Vitamin D Test, CMP, and TSH Test |
| Darkened skin folds | Possible elevated insulin exposure or insulin resistance | 75-g Oral Glucose Tolerance Test, Fasting Glucose Test, and Hemoglobin A1C Test |
| High triglycerides or low HDL cholesterol | Possible cardiometabolic risk pattern | Lipid Panel Test, Glucose Tolerance Test, and Comprehensive Metabolic Panel |
| Rapidly worsening facial hair, voice changes, or other signs of virilization | Potential androgen-producing disorder requiring prompt medical evaluation | Clinician-directed Total Testosterone Test, DHEA-S Test, Androstenedione Test, imaging, and additional evaluation |
Contact a healthcare provider promptly for:
These findings may require urgent clinical assessment and cannot be evaluated through direct-access blood testing alone.
Lab testing can help answer several different questions:
Lab testing cannot independently determine whether someone has PMOS. It also cannot replace a menstrual and medical history, physical examination, ultrasound when indicated, or individualized clinical interpretation.
A mildly elevated testosterone result may have a different meaning depending on SHBG, symptoms, medications, assay method, menstrual history, and the presence of other abnormal findings.
Similarly, a normal Fasting Glucose Test does not necessarily exclude impaired glucose tolerance. A person’s fasting glucose may remain within range while glucose rises excessively after a measured glucose drink. This is why the 75-g Oral Glucose Tolerance Test has a specific role in PMOS metabolic assessment.
Repeating selected tests may help show whether glucose, cholesterol, thyroid, nutritional, or liver markers are stable, improving, or worsening. However, repeated androgen testing may have a limited role once the diagnostic pattern has been established unless a healthcare provider identifies a specific reason to repeat it.
| Lab test | What it measures | Why it may be relevant | Important interpretation points |
|---|---|---|---|
| Total Testosterone Test | Total testosterone circulating in the blood | A preferred marker for investigating biochemical androgen excess | Elevated results may support an androgen-excess pattern. Method quality matters because female testosterone concentrations can be difficult to measure accurately. |
| Free Testosterone Test | Testosterone that is not tightly bound to proteins | May identify increased biologically available testosterone when total testosterone is not clearly elevated | Results depend on the testing method. Calculated free testosterone or equilibrium dialysis may be preferred over less accurate direct methods. |
| Sex Hormone-Binding Globulin Test | A protein that binds testosterone and other hormones | Helps estimate how much testosterone may be biologically available | SHBG may be affected by insulin, thyroid status, liver function, estrogen-containing medication, body composition, and other factors. |
| DHEA-S Test | An androgen produced mainly by the adrenal glands | May add information when testosterone is not elevated or an adrenal source is being considered | An elevated result is not specific to PMOS. Markedly abnormal results require clinician evaluation. |
| Androstenedione Test | An androgen produced by the ovaries and adrenal glands | May provide additional information when testosterone results do not explain symptoms | It is less specific than testosterone and should not be interpreted alone. |
| Progesterone Test | Progesterone produced after ovulation | A properly timed result may help determine whether ovulation occurred | Timing is critical. A low result may reflect incorrect test timing rather than absent ovulation. |
| Anti-Müllerian Hormone Test | Hormone produced by developing ovarian follicles | May help define polycystic ovarian morphology in adults within an established diagnostic algorithm | AMH is not a stand-alone PMOS test and is not recommended for diagnosing adolescents. |
An integrated option that measures several related markers is the Testosterone Total and Free and Sex Hormone-Binding Globulin Test.
| Lab test | What it measures | Why it may be relevant | Important interpretation points |
|---|---|---|---|
| TSH Test | Thyroid-stimulating hormone | Thyroid disorders may cause irregular periods, weight changes, fatigue, hair changes, and fertility concerns | An abnormal TSH does not establish PMOS and may point toward a separate thyroid evaluation. |
| Prolactin Test | Prolactin produced by the pituitary gland | Elevated prolactin may cause missed periods, infertility, or milk production outside pregnancy or breastfeeding | Stress, medication, sleep, exercise, and specimen conditions may temporarily affect prolactin. |
| 17-Hydroxyprogesterone Test | A steroid hormone involved in adrenal cortisol production | Helps screen for nonclassic congenital adrenal hyperplasia, which may resemble PMOS | Timing and clinical context matter. An abnormal result may require clinician-directed follow-up testing. |
| hCG Total Quantitative Pregnancy Test | Human chorionic gonadotropin | Pregnancy should be considered when a menstrual period is late or absent | Testing too early may not identify a very recent pregnancy. Seek clinical care for pregnancy accompanied by pain, bleeding, fainting, or dizziness. |
| Lab test | What it measures | Why it may be relevant | Important interpretation points |
|---|---|---|---|
| Glucose Tolerance Test, 2 Specimens, 75g | Fasting glucose and the glucose response after a standardized 75-g glucose drink | Considered the most accurate available glycemic assessment for PMOS | Requires fasting, preparation, and timed specimens. Illness, medication, activity, and preparation can affect results. |
| Fasting Glucose Test | Blood glucose after an overnight fast | Provides a convenient baseline measure of glucose regulation | It may miss abnormal post-challenge glucose and is less sensitive than an OGTT for PMOS-related glucose assessment. |
| Hemoglobin A1C Test | Approximate average blood glucose over the previous two to three months | May be used when an OGTT cannot be completed and can provide longer-term glucose context | Anemia, iron deficiency, hemoglobin variants, pregnancy, kidney disease, and other factors may affect accuracy. |
| Lipid Panel Test | Total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides | Helps assess cardiometabolic risk associated with PMOS | Results may be influenced by fasting status, diet, medication, recent illness, and genetics. |
| Comprehensive Metabolic Panel Test | Glucose, liver enzymes, kidney markers, electrolytes, calcium, and proteins | Provides broader metabolic, liver, and kidney context | A normal CMP does not exclude PMOS, insulin resistance, impaired glucose tolerance, or metabolic liver disease. |
| ALT Test, AST Test, and GGT Test | Enzymes associated with liver, bile-duct, and, in the case of AST, muscle health | May help identify possible liver strain when metabolic risk is present | Abnormal results have many possible causes and require clinical interpretation. |
| Lab test | Why it may be considered |
|---|---|
| Complete Blood Count with Differential and Platelets | May help investigate anemia, heavy bleeding, fatigue, weakness, infection-related patterns, or poor recovery. |
| Ferritin Test | Measures an iron-storage protein and may help evaluate fatigue, hair shedding, heavy menstrual bleeding, or low iron stores. |
| Iron and Total Iron-Binding Capacity Test | Adds information about circulating iron, iron-binding capacity, and iron availability. |
| Vitamin B12 Test | May be relevant for fatigue, restricted diets, neurological symptoms, digestive concerns, or people using metformin. |
| Folate Serum Test | May help assess nutritional status, selected causes of anemia, and preconception nutrition. |
| Vitamin D 25-Hydroxy Total Test | May be considered when evaluating vitamin D status, bone health, muscle health, or nutritional concerns. |
| Thyroid Peroxidase Antibodies Test | May be appropriate when thyroid results, symptoms, or personal and family history suggest autoimmune thyroid activity. |
| Thyroglobulin Antibodies Test | May provide additional autoimmune thyroid information when clinically appropriate. |
| Celiac Disease Comprehensive Panel | May be considered when digestive symptoms, iron deficiency, nutrient deficiencies, or relevant personal and family history are present. |
| Creatine Kinase Total Test | May be appropriate when muscle pain, muscle weakness, injury, or unusual exercise-related symptoms are present. |
These tests do not diagnose PMOS. They may help investigate symptoms and related health concerns that can occur alongside PMOS or may have another explanation.
Not everyone needs every test. Testing should reflect symptoms, menstrual history, medications, reproductive goals, previous results, and healthcare-provider recommendations.
Common starting considerations may include:
This group helps evaluate androgen activity and ovulation. Total and free testosterone are generally the preferred biochemical markers.
Common considerations may include:
Additional clinician-directed testing may be needed when symptoms are unusual, severe, or rapidly progressing.
Considerations may include:
Metabolic testing matters even at a normal body weight. International guidance recommends assessing glycemic status when PMOS is identified and repeating the assessment every one to three years based on individual diabetes risk factors.
Depending on symptoms and history, testing may include:
These tests may be useful when fatigue, hair loss, heavy bleeding, restricted eating, digestive symptoms, poor recovery, or nutritional concerns are present.
Insulin resistance is central to PMOS biology, but a Fasting Insulin Test is not a stand-alone PMOS test. Current international guidance states that commonly available insulin assays have limited clinical relevance and are not recommended as the primary routine diagnostic approach.
Insulin results can vary by assay, fasting duration, recent activity, stress, and other factors. There is also no universally accepted fasting-insulin cutoff that confirms or excludes insulin resistance in an individual patient.
For guideline-based assessment of glucose risk, the 75-g Oral Glucose Tolerance Test, Fasting Glucose Test, and Hemoglobin A1C Test have clearer roles. A clinician may use an Insulin Test or C-Peptide Test in selected situations, but these results require careful interpretation.
A reference range describes values observed in a laboratory’s comparison population. A result outside the range does not automatically mean that a person has PMOS or another disease. A result within the range also does not necessarily exclude a clinically meaningful hormonal or metabolic pattern.
Androgen levels in women are much lower than typical male concentrations and can be difficult to measure accurately. Current guidance favors validated liquid chromatography–tandem mass spectrometry, or LC-MS/MS, for total testosterone when available.
Free testosterone should preferably be calculated or measured using an appropriately validated method. Direct free-testosterone immunoassays may have limited sensitivity and accuracy.
Hormonal contraceptives may raise SHBG and reduce androgen production, making testosterone results more difficult to interpret. Metformin, corticosteroids, fertility medications, thyroid medication, supplements, and other products may also affect selected tests.
Do not stop or change a medication for testing unless instructed by the prescribing healthcare provider.
Examples of connected patterns include:
Testing may be worth discussing with a healthcare provider when someone experiences:
Testing may also be appropriate before pregnancy or fertility treatment because glucose abnormalities can affect pregnancy health.
Ulta Lab Tests provides direct online access to many hormone, glucose, cholesterol, thyroid, nutritional, and general health tests where available.
Patients can:
Examples of relevant testing available through Ulta Lab Tests include:
Product availability, specimen requirements, patient preparation, and collection locations should be confirmed before ordering.
Direct-access testing can improve access to personal health information, but it does not replace a clinical evaluation. A healthcare professional should review abnormal, conflicting, or unexpected results.
PMOS stands for Polyendocrine Metabolic Ovarian Syndrome. It is the new name for the condition previously called Polycystic Ovary Syndrome, or PCOS. The updated name better reflects the condition’s hormonal, metabolic, reproductive, and whole-body effects and reduces the mistaken belief that it is mainly caused by ovarian cysts.
Yes. PMOS is the updated name for the condition historically known as PCOS. The underlying condition and evidence-based clinical framework did not suddenly change with the new terminology. During the transition, medical and patient education may use “PMOS, formerly PCOS” so people searching either term can find and understand the information.
No. There is no single blood test that confirms or excludes PMOS. Evaluation may include Total Testosterone, Free Testosterone, SHBG, DHEA-S, Progesterone, TSH, Prolactin, 17-Hydroxyprogesterone, glucose testing, and cholesterol testing.
Common tests include Total Testosterone, Free Testosterone, SHBG, TSH, Prolactin, and 17-Hydroxyprogesterone. DHEA-S or androstenedione may be added in selected situations. Progesterone may help assess ovulation, while an OGTT, A1C, fasting glucose, and lipid panel may help evaluate metabolic risk.
Yes. A person may have clinical signs of androgen excess without a clearly elevated testosterone result. Test method, SHBG, medication use, timing, symptoms, and laboratory reference ranges can affect interpretation. DHEA-S or Androstenedione may sometimes provide additional information, but they should not be interpreted alone.
Yes. Ovarian cysts are not required. The historical term “polycystic” referred to the appearance of numerous developing ovarian follicles, not necessarily abnormal or harmful cysts. An adult may meet diagnostic criteria through ovulatory dysfunction and androgen excess without requiring ultrasound or AMH testing.
Current international guidance identifies the 75-g Oral Glucose Tolerance Test as the most accurate available test for assessing glycemic status in PMOS, regardless of BMI. A Fasting Glucose Test or Hemoglobin A1C Test may be used when an OGTT cannot be completed, but they can miss abnormalities that appear after the glucose drink.
A Fasting Insulin Test is not recommended as the main routine diagnostic test for PMOS. Insulin resistance is an important part of the condition, but available insulin assays have significant limitations and no universally accepted diagnostic cutoff. A clinician may use insulin testing selectively, but an OGTT, fasting glucose, and A1C have clearer guideline-defined roles.
These tests help identify conditions that can resemble PMOS. TSH helps assess thyroid function, Prolactin may identify a pituitary-related cause of irregular or absent periods, and 17-Hydroxyprogesterone may help screen for nonclassic congenital adrenal hyperplasia.
Yes. Glucose abnormalities and other metabolic risks can occur in PMOS regardless of body weight. A normal BMI does not rule out impaired glucose tolerance, abnormal cholesterol, or other cardiometabolic concerns. Testing decisions should be based on the complete health pattern rather than body size alone.
International guidance recommends assessing glycemic status when PMOS is identified and repeating the assessment every one to three years based on individual diabetes risk factors. People planning pregnancy, undergoing fertility treatment, developing new symptoms, or experiencing changing health risks may need testing at different times under a clinician’s guidance.
Many relevant hormone, glucose, lipid, thyroid, and nutritional tests can be ordered directly through Ulta Lab Tests where available. However, direct-access testing cannot provide a complete PMOS diagnosis. Results should be reviewed with a qualified healthcare provider who can consider symptoms, medical history, medications, physical findings, and imaging when necessary.
PMOS, formerly PCOS, is best understood as a connected hormonal and metabolic pattern rather than an ovarian-cyst disorder or a single abnormal laboratory result.
A thoughtful testing strategy can help:
Ulta Lab Tests offers direct access to many laboratory tests that may contribute to this evaluation. Explore relevant hormone, reproductive, glucose, cholesterol, thyroid, and nutritional tests, and review the results with a qualified healthcare provider.
Lab testing provides objective health information, but it does not independently diagnose PMOS or replace professional medical advice, imaging, treatment, or ongoing care.
PMOS definition: Polyendocrine Metabolic Ovarian Syndrome, formerly called PCOS, is a long-term hormonal and metabolic condition that may affect androgen levels, ovulation, menstrual cycles, fertility, glucose regulation, cholesterol, and whole-body health. It is evaluated through a combination of clinical history, symptoms, laboratory testing, and ovarian assessment when appropriate.
Related laboratory tests: Total Testosterone, Free Testosterone, SHBG, DHEA-S, Androstenedione, Progesterone, AMH, TSH, Prolactin, 17-Hydroxyprogesterone, 75-g OGTT, Fasting Glucose, Hemoglobin A1C, Lipid Panel, CMP, CBC, Ferritin, Iron and TIBC, Vitamin B12, Folate, and Vitamin D.
How Ulta Lab Tests helps: Ulta Lab Tests provides direct online access to many relevant hormone, metabolic, thyroid, nutritional, and general health tests where available.
Disclaimer: Laboratory testing is informational and should be interpreted with symptoms, medical history, medications, and other clinical findings by a qualified healthcare provider.
The article explains that fasting insulin and C-peptide may provide selected metabolic context but are not stand-alone PMOS diagnostic tests.
TSH appears in both the endocrine-exclusion and thyroid categories because it serves both purposes in the article.
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