Women diagnosed with polycystic ovary syndrome (PCOS), now called polyendocrine metabolic ovarian syndrome (PMOS), face a 4.4 times higher risk of developing atherosclerotic cardiovascular disease compared to women without the condition. In a landmark study of over 413,000 US women, roughly 12 percent of those with PMOS developed artery disease over approximately 10 years, compared with about 4 percent in the comparison group.

The condition affects about 1 in 10 women of reproductive age, making this a significant public health concern. What makes this finding particularly important is that the elevated cardiovascular risk persisted even after researchers accounted for traditional risk factors like obesity, high blood pressure, high cholesterol, and diabetes. This suggests the syndrome damages arteries through biological pathways unique to the condition itself.

Why Is PCOS Now Called PMOS, and What Does That Mean for Your Heart?

The recent name change from polycystic ovary syndrome to polyendocrine metabolic ovarian syndrome reflects a fundamental shift in how doctors understand the condition. The old name focused on the ovaries and the fluid-filled sacs visible on ultrasound, but many women with the condition don't actually have these cysts. More importantly, the condition involves far more than the ovaries alone.

PMOS is a whole-body hormone and metabolic disorder affecting insulin, androgens (male-type hormones), and other hormone systems throughout the body. This systemic nature explains why the cardiovascular complications are so widespread. The study found that heart attack and ischemic stroke (the kind caused by a blocked artery) were each about 3.5 times more likely in women with PMOS. Transient ischemic attacks (sometimes called warning strokes) and peripheral artery disease (clogged arteries in the legs) were each about 5 times more likely.

The pattern reveals something critical: this is not a single organ problem. It looks like artery disease spreading throughout the entire circulatory system, affecting the heart, brain, and legs simultaneously.

What's Driving the Heart Risk if Traditional Risk Factors Don't Fully Explain It?

Researchers at the University of Rochester and the University of Pennsylvania conducted this analysis using insurance claims data from 2000 to 2022, comparing 413,450 women diagnosed with PMOS against more than 2 million women without it. The key insight emerged when they adjusted their analysis for the four major cardiovascular risk factors: obesity, high blood pressure, high cholesterol, and diabetes.

Even after accounting for all of these, the gap in heart disease risk between the two groups narrowed but did not close. This points to biology built into PMOS itself, likely involving chronic inflammation, elevated insulin levels, and hormone imbalances acting directly on blood vessel walls. In other words, a young woman with PMOS who maintains a normal weight and normal blood pressure is not automatically safe from cardiovascular damage.

How to Protect Your Heart If You Have PCOS or PMOS

• Get a cardiovascular risk assessment now: If you have been diagnosed with PCOS or PMOS, ask your doctor for a comprehensive cardiovascular evaluation immediately rather than waiting until your 40s or 50s. This should include blood pressure measurement, a full cholesterol panel, and blood sugar or A1c testing to assess your glucose control.
• Don't rely on normal weight or blood pressure alone: Because this study found extra cardiovascular risk that persisted even after accounting for normal weight and blood pressure, these normal readings should not give you false reassurance. Bring up your PMOS diagnosis specifically at general medical visits, since a diagnosis made years ago in a gynecology office may not be visible to the doctor evaluating your heart.
• Learn the warning signs of cardiovascular events: Familiarize yourself with symptoms that rose most significantly in this study, including sudden leg pain when walking (a sign of peripheral artery disease), and brief episodes of weakness, numbness, or slurred speech that resolve on their own (transient ischemic attacks).

The researchers conducting this study noted an important clinical observation about the age at which risk emerges. The women in the study started at an average age of 31, which is much younger than the typical age when cardiovascular risk conversations usually begin.

"The number that stops me is the age. These women started out at an average age of 31. We are used to thinking about heart risk as a conversation for someone's fifties, so a fourfold difference showing up in a group this young should change how we screen," noted Dr. Ravi Kumar, a board-certified neurosurgeon and health researcher.

Dr. Ravi Kumar, Board-Certified Neurosurgeon

Does a PMOS Diagnosis Mean Heart Disease Is Inevitable?

The answer is no. Even in the higher-risk group, about 88 percent of women did not develop atherosclerotic cardiovascular disease during the follow-up period. A 4.4 times higher risk is a strong signal about a group's overall risk, not a prediction about any individual person's future. The practical value of understanding this elevated risk is that it justifies earlier screening and closer attention to the modifiable risk factors you can actually control.

These controllable factors include blood pressure, blood sugar, cholesterol levels, smoking status, physical activity, and sleep quality. While this study was not designed to test whether earlier treatment changes outcomes, the findings make a compelling case for starting the cardiovascular risk conversation much earlier than conventional practice suggests.

For women with PMOS, the key takeaway is simple: a diagnosis of this condition should trigger a conversation about heart health immediately, not years later. With roughly 1 in 10 women of reproductive age affected by PMOS, ensuring that these women receive appropriate cardiovascular screening and monitoring represents an important opportunity to prevent heart disease before it develops.