When people say PCOS is “a hormone imbalance,” it is rarely just one hormone. PCOS involves several interconnected hormones: androgens (the “male” hormones such as testosterone), insulin, progesterone, estrogen, and sometimes the thyroid and cortisol overlap too. Understanding this bigger picture helps you have a more meaningful conversation with your doctor, not to diagnose yourself. This page is the entry point to our hormone section, and each link below leads to a deeper discussion of an individual hormone.

It helps to be clear about one thing from the start: there is no single blood test that “confirms” PCOS. According to the 2023 international PCOS guideline and the Rotterdam criteria, the diagnosis is made when at least two of three features are present, namely irregular periods (infrequent ovulation), signs of high androgens (through symptoms or blood tests), and polycystic ovaries on ultrasound, after other conditions have been ruled out. So hormones are only part of the puzzle, not the whole of it.

Androgens: the driver of acne and excess hair

High androgens are a common feature of PCOS. This is what often causes stubborn acne, fine hair on the chin or chest, and thinning scalp hair. The main hormone here is high testosterone, but some comes from the adrenal glands as high DHEA-S. Doctors usually assess these levels alongside your symptoms, not as a single isolated value, because laboratory “normal” ranges vary.

One nuance that is often misunderstood: many women with PCOS have a blood testosterone level that is still within the laboratory “normal” range, yet still experience acne and excess hair. This is because what matters is not only the total amount of testosterone, but how much is “free” and active. A hormone called SHBG (sex hormone-binding globulin) acts like a sponge that binds testosterone; when SHBG is low (often linked to insulin resistance), more free testosterone circulates even when the total looks normal. This is why doctors sometimes calculate a “free androgen index” rather than reading a single number. The evidence linking androgens to these symptoms is strong and recognised in all the major guidelines.

Progesterone and unpredictable periods

In PCOS, ovulation often does not happen every month. Without ovulation, the body makes less progesterone, and this is why periods become infrequent, late, or unusually heavy when they finally arrive. Understanding this pattern matters, especially if you are planning a pregnancy. Logging your period dates in your phone is a simple habit you can share at your clinic appointment.

There is a longer-term risk that is rarely discussed openly but is worth knowing. When periods do not come for months, the lining of the womb (the endometrium) stays exposed to estrogen without being “balanced” by progesterone. Over time, this can thicken the lining and raise the risk of abnormal cell changes. That is why doctors often recommend that women with PCOS have at least several periods a year, sometimes with the help of hormone medication. If your periods stop for more than three months at a stretch, this is not just “being a bit late,” and it is worth discussing with your doctor.

Estrogen and LH/FSH: the wider picture

Although the phrase “low estrogen” is often associated with menopause, most women with PCOS actually have adequate or even relatively high estrogen, because it is not balanced by progesterone as described above. This is why PCOS symptoms differ from menopause symptoms, even though both involve changes in periods.

Two other hormones often mentioned in blood test reports are LH (luteinizing hormone) and FSH (follicle-stimulating hormone), produced by the pituitary gland in the brain. In some women with PCOS, the ratio of LH to FSH tends to be high, and this can contribute to the ovaries making more androgens. However, you should know that a high LH/FSH ratio is not a requirement to confirm PCOS, and many women with PCOS have a normal ratio. The evidence for using this ratio as a diagnostic tool is limited, so modern doctors rely more on the Rotterdam criteria as a whole. If you see these numbers in your lab report, do not try to interpret them yourself; bring them to your doctor to be explained in the context of your overall picture.

Insulin: the hormone that is often the hidden driver

Despite the name “polycystic ovary,” many PCOS symptoms actually stem from how the body handles insulin. In many (but not all) women with PCOS, the body becomes less sensitive to insulin, a condition called insulin resistance. To compensate, the pancreas releases more insulin, and these high insulin levels in turn push the ovaries to make more androgens and lower SHBG. This is the chain that links weight, acne, excess hair, and irregular periods into one picture.

The link between insulin resistance and PCOS is strong in terms of evidence, and it is also why the long-term risk of type 2 diabetes and heart disease is raised for women with PCOS. In Malaysia, where the diabetes burden in the population is already high, this metabolic angle is not a small matter. That is why doctors often check fasting blood glucose, HbA1c, or a glucose tolerance test, not because every woman with PCOS is certainly diabetic, but because early detection allows early action. The same lifestyle steps that help metabolism often improve periods and androgen symptoms at the same time.

Thyroid and cortisol, which often overlap

Two other conditions often look so similar to PCOS that they cause confusion. Thyroid problems that overlap with PCOS can cause fatigue, weight gain, and irregular periods, which are almost the same symptoms. Likewise, prolonged cortisol and stress can affect the cycle and blood sugar levels. This is why doctors sometimes ask for extra tests to rule out other possibilities before confirming PCOS.

Thyroid testing (usually TSH, and sometimes free T4 and thyroid antibodies) is a standard part of a careful PCOS assessment, because an underactive thyroid (hypothyroidism) can mimic or overlap with PCOS. By contrast, more complex cortisol testing is usually only done if the doctor suspects a rare condition such as Cushing’s syndrome, that is, when there are specific signs such as very rapid weight gain, easy bruising, or unusually high blood pressure for your age. This is not a routine test for everyone. If you are worried about stress and cortisol, the reasonable first step is enough sleep and daily stress management, not immediately requesting a special test.

Supplements: discuss first, not mandatory

You may have read about herbal supplements such as vitex or chasteberry that are said to help hormone balance. The scientific evidence for these supplements is still limited and mixed, so they are not a mandatory treatment. If you are interested in trying them, discuss with your doctor or pharmacist first, especially if you are taking other medications, trying to conceive, or fasting during Ramadan. Also check the halal status and MAL registration number on the product before buying, because price and quality in the market vary.

Several other supplements are also frequently mentioned in the context of PCOS, and being honest about the level of evidence helps you make an informed choice:

  • Inositol (myo and D-chiro): the most studied for PCOS, with moderate-level evidence suggesting possible benefits for periods and metabolic markers in some women. The dose used in studies is often around 2 to 4 grams of myo-inositol a day, but this is not a prescription; discuss it with your doctor.
  • Vitamin D: many women with PCOS have low vitamin D levels, and that deficiency is worth correcting. However, taking high doses without a confirmed deficiency is not a magic fix; the evidence for a direct effect on hormones is still moderate to limited.
  • Spearmint: some small studies suggest two cups of spearmint tea a day can slightly lower androgens and may help excess hair, but the studies are small and the effect is modest, not a replacement for treatment.

For all supplements, one principle holds: the doses mentioned are “the doses used in studies,” not a personal prescription for you. Supplements can also interact with medications, and their safety during pregnancy or breastfeeding is often not known for certain, so a doctor’s advice takes priority.

How doctors test hormones in Malaysia

Many women feel anxious when handed a long list of blood tests. In truth, you do not need to understand every number; that is the doctor’s job. Still, knowing the rough picture eases the worry. A typical hormone panel for a PCOS work-up may include testosterone (total and sometimes free), SHBG, DHEA-S, LH, FSH, prolactin, TSH for the thyroid, and metabolic markers such as fasting blood glucose, HbA1c, and a lipid profile. Not everyone needs every test; the doctor selects according to your picture.

One Malaysia-specific point you should know: for unmarried women, a transabdominal ultrasound (through the abdomen) is the usual first choice, and PCOS can still be diagnosed without a transvaginal ultrasound. Do not feel you are “required” to undergo a procedure that is uncomfortable; discuss the options with your doctor. In fact, according to current guidelines, in adult women who already have irregular periods and signs of high androgens, an ultrasound is sometimes not needed at all to confirm the diagnosis.

On cost, at a government Klinik Kesihatan the fee is usually about RM1 per visit for citizens, with follow-up around RM5, although some specialised tests may be referred to a hospital. At private clinics, the cost of a hormone panel and ultrasound varies by centre, so it is wise to ask for an estimate first. Official resources such as the Ministry of Health Malaysia MyHEALTH portal can also help you understand the services available.

How to track progress without being overwhelmed by tests

Monitoring PCOS does not mean you need a blood test every month. The most useful monitoring can be done by yourself at home, for free. Logging your period dates helps you and your doctor see whether the cycle is becoming more regular. Weighing yourself in the morning once a week (not every day, to avoid focusing too much on small fluctuations) gives a calmer view of the trend. Noting key symptoms such as acne, the amount of hair you need to remove, or your energy levels is also useful because hormonal changes are often slow and hard to feel day to day.

For blood tests, the frequency is set by your doctor according to your needs, not a fixed schedule for everyone. Some women may repeat metabolic markers such as HbA1c every few months if they are managing insulin resistance, while others may only need an annual review once things are stable. A repeat routine ultrasound is usually not needed once the diagnosis is made, unless there is a specific clinical reason. If you feel burdened by too many tests, asking “will this test change my treatment plan?” is a fair and useful question.

Give a reasonable amount of time before judging the effect of any change. For most PCOS components, eight to twelve weeks is the minimum to see a meaningful clinical effect, whether from lifestyle changes, supplements, or medication. Expecting a change within a few days often leads to unnecessary disappointment.

Common PCOS hormone myths that mislead

Several common beliefs about PCOS hormones can lead to misdirected action. First, many assume they need to “fix one hormone” alone, when these hormones are interconnected, so improving insulin resistance often has a broad effect compared with chasing a single number. Second, some believe pregnancy will “cure” PCOS; in reality PCOS is a long-term condition that is managed, and symptoms can return after delivery. Third, there is an assumption that a “normal” blood testosterone means androgens are not a problem, when free testosterone and SHBG also matter as explained earlier.

Another myth is that you must stop eating rice entirely. What is more practical and sustainable is choosing lower glycaemic index carbohydrates, controlling portion sizes, and adding protein and fibre, rather than cutting out a single food extremely. Finally, herbal supplements are not a substitute for medical treatment when it is needed; the evidence for most of them is still moderate to limited, so they are best seen as additional support discussed with your doctor, not the main solution.

Useful questions to bring to your doctor

Clinic appointments are often short, so preparing questions in advance helps a lot. Among the useful ones:

  • Based on my symptoms and results, which PCOS feature is most prominent in me (androgens, periods, or metabolic)?
  • Have other conditions such as thyroid problems been ruled out?
  • What is the priority for my situation now, namely restoring periods, managing acne and hair, fertility, or metabolic risk?
  • If I am not pregnant now, what are the options to protect the womb from the effect of infrequent periods?
  • When should I come back for follow-up, and which tests need to be repeated?

Bringing a record of your menstrual cycle, a list of current medications and supplements, and a list of key symptoms makes the conversation more efficient and the decisions more suited to your situation.

The most important foundation

Even though this hormonal picture looks complex, the first step for most women stays the same: balanced nutrition, consistent movement, and enough sleep. Small, sustained changes usually have a bigger effect than chasing a single test number. This lifestyle approach addresses the root issue, namely insulin resistance, which links many of the hormones above, so it often improves several symptoms at once.

A note on Ramadan: for most women with PCOS, hormones generally do not change dramatically while fasting, and many can fast safely. However, if you take medication such as metformin, the dosing schedule may need to be adjusted, so plan with your doctor before Ramadan. Likewise, if you are pregnant or breastfeeding, some medications and supplements are not suitable, so every decision needs to be individual.

You may also have heard discussion about a proposal to change the name “PCOS” to a new term that better reflects the metabolic aspect. For now, in Malaysian clinics and in medical coding systems, the term PCOS is still used, so it remains the name you and your doctor will refer to. Any change in terminology, if it happens, is expected to take several years to be fully adopted.

If your periods stop for more than three months, hair or acne worsens quickly, or you struggle to conceive after trying for a while, it is worth seeing an obstetrician-gynaecologist at a government or private clinic for a full assessment. The doctor decides which tests and treatment suit your situation. For more structured next steps, see our quick-start guides and the directory by Malaysian city to find a specialist near you.