PCOS Cardiovascular Diabetes Risk Management

Many people take polycystic ovary syndrome (PCOS) as "just irregular periods." But in the clinic, the part that actually has a long-lasting effect is elsewhere — namely blood sugar and cardiovascular health. PCOS is deeply intertwined with insulin resistance, so over time it can lead to metabolic problems such as diabetes, hyperlipidemia, and high blood pressure. Since menstrual irregularity and diagnosis itself were covered in detail in other articles, this time I will organize only the metabolic and cardiovascular risks from the angle of "lifelong management."

At the root of PCOS sits insulin resistance. When insulin does its job less, more insulin is secreted to lower blood sugar, and this process stimulates the ovary's production of male hormones, manifesting as ovulatory dysfunction and menstrual irregularity. In other words, the outwardly visible menstrual symptoms and the metabolic change progressing inside are two faces from the same root.

So the 2023 International Evidence-based Guideline for PCOS recommends that, from the time of diagnosis, you assess not only reproductive problems but also the metabolic, cardiovascular, sleep, and emotional domains together. In the clinic I often receive the question "Isn't it enough if my period just comes back?" but recovery of menstruation is only one axis of management.

It would be good to remember that even when symptoms look mild, changes in blood sugar and lipids can be progressing slowly inside.

The first metabolic risk to attend to in PCOS is blood sugar. The 2023 International Guideline summarizes that not only in adults but also in adolescent PCOS, there is a high risk of impaired fasting glucose, impaired glucose tolerance, and type 2 diabetes appearing at a relatively young age. That is why being young is no reason to feel safe.

The test method matters too. The same guideline recommends the 75g oral glucose tolerance test (OGTT) as the most accurate assessment, since fasting glucose alone can miss cases. In the clinic, some people feel reassured that "my fasting glucose is normal, so it's fine," but the ability to control post-meal blood sugar is properly seen only by OGTT.

The reassessment cycle is guided as follows.

• Assess blood sugar status once at the time of diagnosis
• After that, reassess every 1 to 3 years according to individual risk factors
• If there are changes such as weight gain, family history, or pregnancy plans, bring the interval forward

The meaning of early detection is not simply in knowing early. It is because the early stage is precisely when there is the greatest room to slow or reverse progression with lifestyle improvement alone. If you have an irregular menstrual cycle, I recommend also considering a blood sugar assessment.

It is reported that women with PCOS can have more cardiovascular disease (CVD) risk factors, and that the risk of cardiovascular disease itself also increases. The 2023 International Guideline recommends assessing cardiovascular risk factors in all women at diagnosis. Lipids and blood pressure are at the core of this.

The lipid test is performed at the time of diagnosis, and the subsequent frequency is adjusted according to whether there is dyslipidemia and additional risk factors. Blood pressure is recommended to be measured annually, and when planning pregnancy or starting infertility treatment. In PCOS, a pattern of low HDL and high LDL is reported to accompany it relatively commonly, so rather than feeling reassured by a single normal value, follow-up is important.

It looks simple as a table, but the part most often skipped in the clinic is precisely this regular follow-up. It is better to keep the testing flow unbroken even during periods when symptoms are quiet.

Pregnancy is one of the times when the metabolic risk of PCOS shows most clearly. PCOS pregnant women are reported to have an increased risk of complications such as gestational diabetes, gestational hypertension, and preterm birth. This is because the underlying insulin resistance shows more readily when it meets the load of pregnancy.

So management is better started before pregnancy. The 2023 International Guideline recommends considering OGTT for all PCOS women who are planning pregnancy or starting infertility treatment. If it could not be performed before pregnancy, it advises getting an OGTT at the first prenatal visit and at 24 to 28 weeks of pregnancy.

The main course of the pre-pregnancy check is as follows.

• Confirm weight, blood pressure, and blood sugar in advance before pregnancy
• If needed, stabilize lifestyle correction first
• Set the OGTT schedule for early pregnancy and 24 to 28 weeks in advance

In my clinical experience, those who organized their metabolic indicators from the moment they resolved on pregnancy also had much smoother management during pregnancy. In the flow of consulting on pregnancy and contraception together, I recommend attending to the metabolic check at the same time.

I really often receive the question "Do I have to start medication right away?" To put the conclusion first, lifestyle improvement comes first. The 2023 International Guideline also recommends a lifestyle intervention combining exercise, or diet and exercise, with behavioral strategies, as the very first recommendation for all PCOS women.

The basic axes of lifestyle management can be organized as follows.

• Combine regular aerobic exercise and strength exercise
• Record waist circumference and weight to manage central obesity
• Care for sleep and stress together
• Reduce smoking and heavy drinking

Medication is a stage added on top of lifestyle. The same guideline summarizes that in adult PCOS with a body mass index of 25 or higher, metformin can be considered to improve insulin resistance and blood sugar and lipids. That said, the application of medication and surgery is judged individually within the same framework as general metabolic syndrome management. This is why metabolic syndrome management and the problem of weight gain must be looked at together.

I have briefly gathered the repeated questions from the clinic.

Am I fine if I am young? Even at a young age, the relative risk increases. Rather, the earlier you start prevention, the more advantageous it is.

Is it enough to look at fasting glucose alone? Fasting glucose alone can miss cases, so the guideline recommends OGTT as the most accurate test.

If there are no symptoms, can I put off testing? Metabolic changes often progress without symptoms, so it is safer to keep up regular assessment regardless of symptoms. For the flow of regular checkups, you may also refer to why regular checkups matter.

PCOS is not simple menstrual irregularity but a metabolic state that affects you over a lifetime. The small habits and regular checks of now are the most realistic way to lower the risk of heart disease and diabetes in the distant future. If you want to know your risk accurately, please ask about the testing schedule and management direction by chat.

Written by Lee Dong-hee, Director · OB-GYN specialist · See physician profile

First published October 11, 2025 · Last reviewed May 30, 2026

References: International Evidence-based Guideline for the Assessment and Management of PCOS (2023), Journal of Clinical Endocrinology & Metabolism (2023), Journal of the American Heart Association (2024)

This article is intended to provide general health information and does not replace individual diagnosis or treatment. If you have symptoms, please consult through a medical visit.