For many women, a PCOS diagnosis begins with something that seems far removed from heart disease: irregular periods, acne, unwanted facial hair, difficulty managing weight, or trouble getting pregnant.
But PCOS has never been only about the ovaries.
The condition, now officially renamed polyendocrine metabolic ovarian syndrome (PMOS), can also affect insulin sensitivity, blood pressure, cholesterol, and other aspects of metabolic health. And a major 2026 study of more than 2.4 million women suggests those effects may translate into something more consequential later on: a substantially higher rate of heart and blood vessel disease.
Researchers included 413,450 women diagnosed with PMOS and more than 2 million women without the condition. The women were only 31 years old on average when they entered the study. Yet those with PMOS went on to experience atherosclerotic cardiovascular disease, including coronary artery disease, cerebrovascular disease, and peripheral artery disease, at a considerably higher rate.
That doesn’t mean a young woman with PCOS is destined to have a heart attack or stroke. It does suggest that a diagnosis made during the reproductive years may offer an opportunity to start paying attention to cardiovascular health decades earlier than many women otherwise would.
PCOS Is About More Than Periods and Fertility
PCOS is one of the most common hormonal conditions affecting women of reproductive age. Despite its familiar name, ovarian “cysts” were never necessary for diagnosis, and many of the small structures seen on ultrasound are actually immature follicles rather than true cysts.
That’s one reason an international group of experts recommended changing the name in 2026 from polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS). The new terminology is intended to better reflect a condition involving the ovaries, hormones, and metabolism rather than suggesting that cysts are its defining feature.
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The metabolic piece is particularly important when talking about heart health.
Many women with PCOS develop insulin resistance, meaning their cells don’t respond to insulin as effectively as they should. The body may compensate by producing more insulin. Over time, PCOS is also associated with higher rates of type 2 diabetes, abnormal cholesterol, high blood pressure, and excess abdominal fat.
Those are also familiar risk factors for cardiovascular disease.
But researchers have been trying to answer a bigger question: do women with PCOS actually go on to experience more cardiovascular disease, or do they simply have more of the risk factors associated with it?
A Study of More Than 2.4 Million Women Offers an Answer
The 2026 study examined U.S. insurance data collected between 2000 and 2022.
Researchers identified 413,450 women ages 18 to 50 with PMOS and compared them with more than 2 million women of the same age without the condition. None had previously been diagnosed with atherosclerotic cardiovascular disease when they entered the study.
The researchers then looked for cardiovascular events involving coronary artery disease, cerebrovascular disease, or peripheral artery disease.
Women with PMOS had an adjusted hazard ratio of 4.40, meaning the rate of these cardiovascular outcomes during follow-up was more than four times that of the comparison group after the researchers accounted for numerous other factors.
That’s an important distinction. Women with PMOS did have more traditional cardiovascular risk factors to begin with. But those differences did not completely account for the association with cardiovascular disease.
Because this was an observational study based on insurance claims, however, it cannot prove that PMOS itself directly causes cardiovascular disease. And a fourfold relative increase shouldn’t be confused with a fourfold absolute chance of having a heart attack or stroke. Cardiovascular events remain relatively uncommon in younger women.
Signs May Appear Before Symptoms Do
The 2026 findings don’t come completely out of the blue.
A 2023 analysis published in the Journal of the American Heart Association examined evidence of subclinical atherosclerosis, changes in the arteries that can develop before someone experiences symptoms such as chest pain or has a cardiovascular event.
Researchers have found markers including coronary artery calcium and increased carotid artery thickness in women with PCOS. These measurements can provide clues about atherosclerosis developing beneath the surface.
That’s particularly relevant because PCOS is often diagnosed during someone’s teens, 20s, or 30s, when cardiovascular disease may seem like a distant concern.
The new research suggests that reproductive and cardiovascular health shouldn’t necessarily be treated as two completely separate chapters of a woman’s life.
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Why Might PCOS Affect the Heart?
There probably isn’t one explanation. Insulin resistance is common in PCOS and can contribute to elevated blood sugar and eventually type 2 diabetes.
Cholesterol abnormalities are also common. Some women develop higher triglycerides or LDL cholesterol and lower HDL cholesterol, creating a less favorable cardiovascular profile. High blood pressure and excess abdominal fat can add additional risk.
Researchers are also studying whether hormonal differences, chronic low-grade inflammation, and other biological features of PCOS contribute independently to vascular changes.
Importantly, not every woman with PCOS has obesity, diabetes, or hypertension. The 2026 findings suggest cardiovascular health may still deserve attention in women who don’t have those traditional risk factors.
That makes the findings relevant even to someone with PCOS who is young, active, and otherwise considers herself healthy.
This Doesn’t Mean Every Woman With PCOS Needs a Heart Scan
A finding like “four times the rate” can sound alarming, particularly to someone who was diagnosed with PCOS years ago and has never thought of herself as being at cardiovascular risk.
But the study isn’t saying that every woman with PCOS is on the verge of developing heart disease.
It’s better understood as a reason to start the cardiovascular conversation earlier.
Blood pressure, cholesterol, blood sugar, smoking, physical activity, and family history are all pieces of cardiovascular risk that can be assessed long before symptoms of heart disease appear.
The study also doesn’t establish that every woman with PCOS needs coronary calcium scans or other advanced cardiovascular imaging. What testing makes sense depends on age, symptoms, family history, and a person’s overall risk profile.
What Can Women With PCOS Do?
The encouraging part of identifying cardiovascular risk early is that many of the factors involved can be monitored and treated.
Regular physical activity can improve cardiovascular fitness and insulin sensitivity. A dietary pattern emphasizing vegetables, fruit, whole grains, legumes, nuts, healthy fats, and adequate protein can support metabolic and cardiovascular health. Avoiding smoking remains one of the most important ways to reduce cardiovascular risk.
For some women, lifestyle changes won’t be enough, and that’s not a failure. High blood pressure, diabetes, and abnormal cholesterol can all require medical treatment.
The more useful question for someone with PCOS may therefore be less “Am I going to develop heart disease?” and more “Do I know what my cardiovascular risk factors look like now?”
PCOS May Be an Earlier Opportunity to Protect the Heart
For decades, PCOS was framed largely around periods, fertility, and visible symptoms such as acne or excess hair growth. Its new name, PMOS, reflects a broader recognition that the condition reaches well beyond the ovaries.
The new cardiovascular research adds another important piece.
A diagnosis in someone’s 20s or 30s may identify women who could benefit from paying closer attention to blood pressure, cholesterol, blood sugar, and other cardiovascular risk factors years before heart disease would ordinarily be top of mind.
It doesn’t mean heart disease is inevitable. It means PCOS may provide an earlier warning that cardiovascular health deserves a place in the conversation.
Disclaimer: This information is not intended to be a substitute for professional medical advice, diagnosis, or treatment and is for information only. Always seek the advice of your physician or another qualified health provider with any questions about your medical condition and/or current medication. Do not disregard professional medical advice or delay seeking advice or treatment because of something you have read here.
AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.
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