The PMOS heart risk every woman in her thirties should know

If you were diagnosed with polycystic ovary syndrome, the name on your medical chart may already be different: it is now called polyendocrine metabolic ovarian syndrome, or PMOS. The timing of that rename matters, because a massive new study from Penn Medicine finds the PMOS heart risk is far greater than doctors previously understood. Researchers analyzed health records from more than four hundred thousand women with the condition and more than two million without it, and found that women with PMOS face roughly four times the risk of cardiovascular disease. Here is what changed, what the study found, and what it means if you are in your twenties or thirties.

PMOS heart risk: what the study found

The study, published in The Lancet Obstetrics, Gynaecology & Women's Health, drew on health insurance records running from 2000 to 2022 and covered women between eighteen and fifty, with the average age just past thirty-one. After accounting for other risk factors, the researchers found that women with PMOS were roughly two and a half times more likely to have a heart attack or stroke during the study period than women without the condition, as reported by Madhyamam. The breadth of the PMOS heart risk is what alarmed the authors: the same analysis found the PMOS group was three point four times more likely to have a transient ischemic attack, a temporary blockage of blood flow to the brain, while the risk of peripheral artery disease in the legs and other limbs was nearly quadrupled.

Perhaps the most striking detail is how little of the gap the usual risk factors explain. New cases of high blood pressure, high cholesterol, type two diabetes and obesity accounted for only about thirty-six percent of the association, which suggests the PMOS heart risk comes from the condition's own pathways, such as chronic low-grade inflammation, as much as from weight or blood sugar. Senior author Anuja Dokras, a professor of women's health at the University of Pennsylvania and director of its PMOS center, said the findings mean clinicians should "closely monitor cardiovascular health" in women with the condition. She also urged patients to control the familiar modifiable factors: smoking, inactivity, obesity, high LDL cholesterol, diabetes and high blood pressure.

Why PCOS became PMOS

The rename has a long backstory. The condition had been known as PCOS since nineteen thirty-five, and it took fourteen years of campaigning led by Dokras and experts around the world to change it. In May 2026, a global consensus published in The Lancet formally renamed it polyendocrine metabolic ovarian syndrome, backed by the World Health Organization, the Endocrine Society, the American Society for Reproductive Medicine and fifty-six other organizations, after surveys of more than twenty-two thousand patients and providers, according to Medical Daily. The old name misled everyone: the cyst-like structures on ultrasound are actually immature follicles, and roughly a fifth of women with the condition do not have them at all. Between ten and thirteen percent of women of reproductive age have PMOS, and about seventy percent of them are unaware they have it, according to the World Health Organization figures cited in Penn Medicine's news release.

Not everyone is sold on the new name. According to Medscape, several experts raised concerns about the rollout, with one panelist at the Endocrine Society's annual meeting voicing direct objections to the terminology and others calling the process rushed. The study itself also has limits: it was built from insurance records rather than a controlled trial, so it shows a strong association rather than proof of cause and effect, and the researchers say the precise biological mechanisms behind the PMOS heart risk still need more study. Part of why quantifying the PMOS heart risk matters now is that so many patients were diagnosed under the old label and never screened for metabolic fallout.

What to do about your PMOS heart risk

If you are in your twenties or thirties, this is not a reason to panic, but it is a reason to ask for more than a fertility-focused workup. Understanding your own PMOS heart risk starts with the basics: ask your doctor whether your blood pressure, cholesterol and blood sugar have been checked recently, and whether your heart health should be tracked alongside your hormone care. That conversation matters most for anyone diagnosed under the old PCOS label years ago who never received metabolic screening. The condition affects about one in eight women worldwide, more than one hundred seventy million people, according to the Endocrine Society figures reported by Medical Daily, and the average diagnostic delay still runs two to three years. For broader reading on heart health, see our health coverage, including a related piece on why artery plaque risk starts earlier than you think.