PMOS (PCOS) Treatment in Singapore

Polyendocrine metabolic ovarian syndrome (PMOS), the condition formerly known as polycystic ovary syndrome (PCOS), is a hormonal and metabolic condition affecting women of reproductive age. It commonly leads to irregular menstrual cycles, elevated androgen levels and multiple small ovarian follicles visible on ultrasound. It can affect metabolism and may increase the risk of longer-term health concerns, including type 2 diabetes, cardiovascular disease and fertility difficulties.

Dr. Harvard Lin

Obstetrician & Gynaecologist

MBBS (SG) | MRCOG (UK) | MMed (OBGYN) (SG)

Symptoms Causes Diagnosis Treatment Prevention FAQ

Symptoms of PMOS (Formerly PCOS)

PMOS symptoms vary among individuals, with some experiencing mild effects and others more pronounced changes.

Irregular Menstrual Cycles

Periods may be infrequent (fewer than eight times per year), absent for several months, or highly unpredictable due to disrupted ovulation.
Excess Hair Growth

Dark, coarse hair may develop on the face, chest, back, or other areas where men typically grow hair, caused by elevated androgen levels.
Acne

Persistent acne on the face, chest, and upper back may be resistant to standard treatments due to increased oil production from hormonal imbalances.
Weight Changes

Weight gain, especially around the midsection, is common and often difficult to manage with conventional weight-loss methods due to insulin resistance.
Hair Loss

Thinning hair or male-pattern baldness on the scalp may occur as a result of elevated androgen levels, often progressing over time.
Skin Darkening

Dark, velvety patches of skin, known as acanthosis nigricans, may appear in body folds, particularly around the neck, groin, and under the breasts, often linked to insulin resistance.

Causes and Risk Factors

Multiple factors contribute to the development of PMOS, often interacting to disrupt hormonal balance and metabolic function.

Genetic Predisposition

A family history of PMOS (PCOS) or type 2 diabetes increases susceptibility, suggesting a hereditary component in hormone regulation and insulin function.

Insulin Resistance

A reduced ability of the body to respond to insulin leads to elevated blood sugar and insulin levels. This can stimulate excess androgen production and disrupt ovulation.

Chronic Inflammation

Persistent low-grade inflammation may contribute to increased androgen levels, further affecting ovarian function and metabolic health.

Excess Androgen Production

Overproduction of androgens by the ovaries interferes with ovulation, leading to irregular periods, excess hair growth, and acne.

Diagnostic Methods

Physical Examination: Includes measuring blood pressure, BMI, and waist circumference while assessing visible signs such as excess hair growth, acne, or skin changes. This helps establish a baseline and identify common features of PMOS.
Blood Tests: Analyse hormone levels, including testosterone, DHEA, FSH, LH, prolactin, and anti-Müllerian hormone (AMH), which may be used as an alternative to ultrasound in assessing ovarian morphology.
Additional tests evaluate insulin resistance, cholesterol levels, and thyroid function to rule out other conditions with similar symptoms.
Pelvic Ultrasound: Evaluates ovarian appearance and uterine lining thickness. The scan detects multiple small follicles and increased ovarian volume, which are supportive findings in PMOS. Ultrasound is not required in every case.
Medical History Review: Examines menstrual patterns, weight fluctuations, and family history of PMOS or related conditions to track symptom progression and identify potential risk factors.

Treatment Options

PMOS management is personalised to address symptoms, restore hormonal balance, and support long-term health.

Non-Surgical Treatment

Lifestyle Modifications: Regular physical activity and a well-balanced diet help regulate blood sugar levels, manage weight, and improve insulin sensitivity. These changes can promote hormonal balance, regulate menstrual cycles, and reduce symptoms such as excess hair growth and acne.

Hormonal Medications: Birth control pills or progestin therapy help stabilise hormone levels, regulate menstrual cycles, and lower androgen production. This can lead to improved skin health, reduced hair growth, and a lower risk of endometrial issues associated with irregular periods.

Insulin-Sensitising Medications: Metformin may be prescribed to improve insulin resistance, a common feature of PMOS. It helps regulate blood sugar levels, supports weight management, and in some cases, restores ovulation, improving fertility outcomes.

Surgical Treatment

Ovarian Drilling: This laparoscopic procedure involves creating small punctures in the ovaries using heat or laser to reduce androgen production. By lowering androgen levels, ovarian drilling may help restore regular ovulation in women who have not responded to medication. This is generally considered a second-line option where medication has not produced the intended response. Benefits may not be lasting and suitability is assessed individually.

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Prevention and Management

While PMOS cannot be prevented, proper management reduces complications and improves quality of life. Regular monitoring of blood sugar, blood pressure, and cholesterol levels helps detect potential health issues early. A combination of consistent medication use, regular physical activity, and a balanced diet maintains symptom control. Working with healthcare providers to adjust treatment plans supports appropriate ongoing management

Frequently Asked Questions (FAQ)

Does PMOS increase cancer risk?

Women with PMOS have a higher risk of endometrial cancer due to irregular periods and prolonged exposure to unopposed oestrogen. Regular monitoring and appropriate treatment help reduce this risk.

Will PMOS symptoms improve after menopause?

Symptoms like irregular periods and fertility issues naturally resolve after menopause. However, metabolic aspects of PMOS may continue and require ongoing management to prevent cardiovascular complications.

Is PMOS the same as having ovarian cysts?

No. PMOS is a hormonal and metabolic condition, while ovarian cysts can occur for various reasons in women who do not have PMOS. This distinction is one of the reasons the condition was renamed from polycystic ovary syndrome in 2026. The word “polycystic” referred to small fluid-filled follicles seen on ultrasound, which are immature egg-containing follicles rather than pathological cysts. Many women with PMOS do not have these findings at all, and a diagnosis does not depend on them.

Has PCOS been renamed? What is PMOS?

Yes. In May 2026, an international consensus published in The Lancet, developed with 56 academic, clinical and patient organisations, renamed polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS). The condition itself has not changed. A previous PCOS diagnosis carries forward as PMOS, and management remains the same. The earlier name suggested the condition was defined by ovarian cysts, which is inaccurate, and it obscured the hormonal and metabolic features that affect long-term health. Both terms are expected to remain in use during a transition period of approximately three years while clinical guidelines and classification systems are updated. If you were previously told you have PCOS, you may continue to use either term with your gynaecologist.

Dr. Harvard Lin

Obstetrician & Gynaecologist

MBBS (SG)|MRCOG (UK)|MMed (OBGYN) (SG)

Dr. Lin has a clinical focus on female pelvic medicine and reconstructive surgery, encompassing the management of urinary incontinence, overactive bladder, and prolapse.

Dr. Lin completed his medical training at the National University of Singapore and obtained advanced certifications in Obstetrics and Gynaecology. He is a Member of the Royal College of Obstetricians and Gynaecologists in the UK.
Dr. Lin serves as a clinical tutor at NUS and contributes to laparoscopic and pelvic floor workshops. His research includes stem cell therapy, synthetic meshes, and translational medicine, with publications in peer-reviewed journals and textbooks.

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