PCOS (PMOS) Treatment in Singapore: What Your Options Actually Are

If you have just been diagnosed with PCOS — now increasingly referred to as PMOS following the 2026 Lancet international recommendation — and have searched online for "PCOS treatment Singapore", you have probably found dozens of clinic websites, each recommending something slightly different. It can be confusing, and it may seem as though the treatment you receive depends largely on which clinic you visit.

A more useful way to think about it is this: there is no single "PCOS treatment" regime. The right treatment depends on your treatment goal. A woman's treatment priorities often change over time — at 25, she may be focused on regular cycles and clearer skin; at 32, on trying to conceive; and at 45, on protecting her long-term metabolic and cardiovascular health. This page provides an overview of the treatment options available in Singapore, organised around the goal of treatment, so you can go into your consultation knowing what questions to ask.

Start with the goal, not the label

A PMOS diagnosis is not a single problem with a single fix. No two women experience PMOS in exactly the same way. The 2023 International Evidence-Based Guideline — the consensus most Singapore doctors follow — takes exactly this approach: identify the treatment goal, then choose the most appropriate treatment. In practice, the main treatment goals are:

• Regular, predictable menstrual cycles (and the endometrial protection that comes with them)
• Fewer androgen-related symptoms, such as acne, unwanted hair growth and scalp hair thinning
• Fertility, now or in the near future
• Long-term metabolic health, including insulin resistance, weight management and the downstream health risks associated with them

Most women have more than one of these treatment goals at the same time. That is entirely normal, and it is why a good management plan usually consists of a shared foundation together with one or two goal-specific treatments, rather than a single medication.

The foundation almost everyone shares: metabolic care

Whatever your treatment goal, the guideline starts with the same foundation: lifestyle and metabolic care. This is not the dismissive "just lose weight" advice that many women in Singapore have heard — and rightly found frustrating. Insulin resistance underlies many of the features of PMOS, so the aim is to improve how your body responds to insulin. Doing so can help improve menstrual cycles, skin symptoms, fertility and long-term metabolic health at the same time.

For women whose weight is above the recommended range — and for women of Asian ancestry, that threshold is lower, with a BMI of around 23 rather than 25 — even a modest 5–10% reduction in body weight may be enough to restore ovulation. The goal, however, is metabolic rather than cosmetic. How you eat and move matters more than the number on the scale, and lean women with PMOS also benefit from this foundation. Our Singapore hawker-center eating guide is a practical place to start.

On the supplement side, myo-inositol remains the best-evidenced foundation option. Clinical trials suggest that it performs comparably to metformin in restoring menstrual cycles, while generally causing fewer side effects. It is not a cure, and around one-third of women do not respond, but it is a reasonable, low-risk first step for many women. We explain how Oestra selects supplements and how to choose a quality inositol supplement in Singapore, including why the 40:1 myo-inositol to D-chiro-inositol ratio is the formulation most commonly supported by current evidence.

If your goal is regular cycles or androgen symptoms

If you are not trying to conceive, there are two common medication options for improving cycle regularity. A cyclic progestogen — taken for a course of days every one to three months — induces a withdrawal bleed and protects the womb lining. It is commonly used when contraception is not required. A combined oral contraceptive pill regulates menstrual cycles while reducing androgen levels, making it a common choice when acne or unwanted hair growth is also a concern. Neither medication "fixes" PMOS; both help manage the condition for as long as you take them.

Cycle regularity matters for more than convenience. Chronically infrequent or absent periods leave the womb lining exposed to unopposed estrogen, which is the main mechanism linking PMOS to an increased risk of endometrial cancer. Having regular withdrawal bleeds provides genuine protection, not simply a more predictable cycle.

For androgen-related symptoms, anti-androgen medications and topical treatments can be added where appropriate. It is also important to give treatment enough time to work. Skin often takes four to six months to improve, while changes in hair growth usually take even longer. That "90-day rule" is worth internalising before deciding that a treatment is not working.

If your goal is fertility

The good news is that, for most women with PMOS, fertility treatment does not begin with IVF. The recommended first-line treatment is usually letrozole to induce ovulation. The 2023 International Evidence-Based Guideline recommends letrozole over the older medication clomiphene because it is associated with higher live birth rates. It is often combined with metabolic optimization before or during treatment.

Fertility care is a topic in its own right, including Singapore's IVF co-funding schemes that many couples are unaware of. We cover this separately in our guide to PCOS and fertility in Singapore.

One important point to remember is that some medications used to treat PMOS are not suitable when you are trying to conceive. GLP-1 receptor agonists, for example, should be stopped well before pregnancy is planned. Always let your doctor know if pregnancy is one of your current or near-future goals.

Where metformin and GLP-1 medications fit

Metformin has long been a cornerstone of treatment for women with PMOS who have insulin resistance. Although its use in PMOS is technically off-label, this should not be mistaken for experimental care. Rather, it reflects a well-established prescribing practice supported by decades of clinical research and endorsed by multiple international guidelines. It generally has a greater effect on menstrual cycles and metabolic markers than on weight loss.

GLP-1 receptor agonists, and the newer dual agonists, have expanded the treatment options for women in whom excess weight and insulin resistance are major concerns. In selected women, combining a GLP-1 medication with metformin may produce better metabolic outcomes than either medication alone. These medications do, however, have important trade-offs. They are not suitable around conception, and they are not the appropriate starting point for every woman. We review the GLP-1 evidence regularly and discuss where these medications fit in PMOS management without overstating their benefits.

The key principle is simple: medications are selected according to the treatment goal, not according to a fixed treatment ladder. A woman seeking clearer skin and a woman aiming to improve insulin resistance may both have PMOS, yet require entirely different treatment plans.

Getting treatment in Singapore: who prescribes what

You may not need to see a specialist to begin treatment. Singapore's primary care guideline explicitly recognizes the central role of GPs and polyclinic physicians in the diagnosis of PMOS and the initiation of evidence-based first-line management. Most women do not need to see an endocrinologist or gynecologist at the outset (Singapore Med J, 2018).

Specialist referral becomes more appropriate if you are trying to conceive, if your symptoms remain difficult to control despite initial treatment, or if you have more complex metabolic concerns that require further assessment.

If you are deciding where to seek care, our companion guides explain the Singapore healthcare pathway in more detail: where to get tested and what it costs, and how to choose a PMOS-literate specialist — including how to recognize a doctor who will look beyond simply telling you to "lose weight".

What this means for you

Treatment for PMOS is not a single prescription. It is a shared foundation of metabolic care together with treatments chosen to match your current goals. Knowing what you want to achieve before your consultation is one of the most useful things you can do. It transforms a broad question such as "Can you help with my PCOS?" into a focused discussion about the outcomes that matter most to you.

If you are not yet sure which aspects of PMOS are driving your symptoms, or where to begin, Oestra's free five-minute assessment can help identify the areas that deserve the greatest attention. If you decide you would rather not navigate supplements on your own, Oestra can recommend evidence-based options matched to your symptom profile.

Citations

• Teede HJ, et al. International Evidence-Based Guideline for the Assessment and Management of Polycystic Ovary Syndrome 2023. (Goal-directed management; first-line lifestyle; letrozole preferred for ovulation induction.)
• Lua ACY, How CH, King TFJ. Managing polycystic ovary syndrome in primary care. Singapore Med J. 2018;59(11):567–571.
• SingHealth. Polycystic Ovary Syndrome (PCOS) — patient information (Singapore).
• Facchinetti F, et al. Myo-inositol vs metformin trials in PCOS (comparable cycle restoration, better tolerability).