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Polyendocrine Metabolic Ovarian Syndrome (PMOS)

Polyendocrine Metabolic Ovarian Syndrome (PMOS) is a chronic endocrine-metabolic disorder characterized by ovarian dysfunction, androgen excess, and metabolic abnormalities, commonly presenting with irregular ovulation, hyperandrogenism, and insulin resistance.

Also called

Polycystic Ovary Syndrome (PCOS)

ICD-10

E28.2

Specialty

Endocrine

Onset

Chronic

Reviewed

August 2026

On This Page

Overview

–Polyendocrine Metabolic Ovarian Syndrome (PMOS) is one of the most common endocrine disorders affecting women of reproductive age.

-The main clinical features are:

  • Ovulatory dysfunction
  • Hyperandrogenism
  • Polycystic ovarian morphology

-Metabolic abnormalities are also common, particularly:

  • Insulin resistance
  • Obesity
  • Dyslipidemia
  • Increased risk of Type 2 Diabetes Mellitus

Not every patient has ovarian cysts, and polycystic ovarian morphology is not required for diagnosis.

Etiology & Risk Factors

Etiology:

The exact cause is multifactorial and involves:

  • Genetic susceptibility
  • Insulin resistance and compensatory hyperinsulinemia
  • Increased ovarian androgen production
  • Abnormal hypothalamic-pituitary-ovarian signaling

-Risk Factors:

  • Family history of Polyendocrine Metabolic Ovarian Syndrome (PMOS) /PCOS
  • Obesity
  • Insulin resistance
  • Type 2 Diabetes Mellitus
  • Sedentary lifestyle

Pathophysiology

Genetic/environmental factors → insulin resistance + abnormal ovarian/adrenal androgen production → hyperandrogenism → impaired follicular development + anovulation → irregular menstruation + infertility

Insulin resistance → hyperinsulinemia → increased ovarian androgen production + reduced hepatic SHBG → ↑ free androgens → hirsutism/acne

Clinical Presentation

-Symptoms:

  • Irregular menstrual cycles
  • Oligomenorrhea
  • Amenorrhea
  • Infertility
  • Hirsutism
  • Acne
  • Weight gain
  • Difficulty losing weight
  • Hair thinning
  • Symptoms of insulin resistance

 

-Signs:

  • Hirsutism
  • Acne
  • Androgenic alopecia
  • Obesity, particularly central obesity
  • Acanthosis nigricans
  • Irregular menstrual pattern

History Taking

-Ask about:

  • Polyuria
  • Polydipsia
  • Polyphagia
  • Weight loss
  • Fatigue
  • Blurred vision
  • Nocturia
  • Recurrent infections
  • Symptoms of DKA
  • Previous episodes of hyperglycemia or DKA
  • Insulin use and adherence
  • Insulin dose and administration technique
  • Blood glucose monitoring
  • Continuous glucose monitoring, if used
  • Episodes of hypoglycemia
  • Dietary habits

Physical Examination

-General Examination

  • BMI
  • Waist circumference
  • Blood pressure

-Look For:

  • Obesity
  • Hirsutism
  • Acne
  • Acanthosis nigricans
  • Androgenic alopecia

 

System-Specific Examination:

–Assess for clinical evidence of:

  • Hyperandrogenism
  • Insulin resistance
  • Other endocrine disorders when suspected

Investigations

-Complete Blood Count

Not routinely required for diagnosis.

-Peripheral Blood Film

Not indicated for diagnosis.

-Biochemistry / Specific Tests

Androgen Assessment

  • Total testosterone

  • Free testosterone or calculated free testosterone

  • SHBG when appropriate

  • DHEA-S when adrenal androgen excess is suspected

Metabolic Assessment

  • Fasting glucose

  • 75-g oral glucose tolerance test (OGTT)

  • HbA1c when appropriate

  • Lipid profile

-Other Tests

Depending on presentation:

  • TSH

  • Prolactin

  • 17-hydroxyprogesterone

  • Pregnancy test

-Imaging

Pelvic Ultrasound

May demonstrate polycystic ovarian morphology.

However, ultrasound is not required in every patient if the diagnosis can already be established clinically and biochemically.

-Special / Confirmatory Tests

There is no single confirmatory test for Polyendocrine Metabolic Ovarian Syndrome (PMOS).

Diagnosis is based on established clinical criteria after excluding alternative causes.

Diagnosis

-In adults, Polyendocrine Metabolic Ovarian Syndrome (PMOS) is diagnosed when at least 2 of the following 3 features are present, after excluding other causes:

  1. Ovulatory dysfunction
  2. Clinical or biochemical hyperandrogenism
  3. Polycystic ovarian morphology on ultrasound

-Ovarian cysts are not required for diagnosis.

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Management

1. First-Line / Emergency Management

There is no routine emergency treatment.

Management depends on the patient’s main problem:

  • Menstrual irregularity

  • Hyperandrogenism

  • Infertility

  • Obesity

  • Insulin resistance/metabolic risk

 

2. Definitive Treatment

There is no single curative treatment.

Management is individualized according to reproductive and metabolic goals.

 

3. Medical Treatment

-Combined Oral Contraceptive Pills

First-line pharmacological treatment for many patients with:

  • Menstrual irregularity

  • Hirsutism

  • Acne

 

–Metformin

Useful particularly in patients with:

  • Type 2 Diabetes Mellitus

  • Prediabetes

  • Significant metabolic risk

  • Insulin resistance

 

-Antiandrogens

Spironolactone may be used for persistent hirsutism when appropriate contraception is provided.

-Infertility

Letrozole is generally the preferred first-line pharmacological treatment for ovulation induction in women with PMOS/PCOS-related anovulatory infertility.

 

4. Surgical / Procedural Treatment

Laparoscopic ovarian surgery/drilling may be considered in selected patients with anovulatory infertility when medical ovulation induction is unsuccessful.

 

5. Supportive Management

  • Weight management

  • Regular physical activity

  • Healthy diet

  • Cardiometabolic risk assessment

  • Management of dyslipidemia and hypertension

Complications

  • Infertility
  • Endometrial hyperplasia
  • Endometrial cancer
  • Type 2 Diabetes Mellitus
  • Prediabetes
  • Dyslipidemia
  • Hypertension
  • Obesity
  • Cardiometabolic disease
  • Obstructive sleep apnea
  • Depression and anxiety

Prognosis

–Polyendocrine Metabolic Ovarian Syndrome (PMOS) is a chronic condition with variable clinical expression.

–Symptoms can be effectively managed, and fertility can often be achieved with appropriate treatment.

-Long-term outcomes depend mainly on:

  • Metabolic risk
  • Weight
  • Insulin resistance
  • Duration of anovulation
  • Adequacy of treatment and follow-up

Key Points / Clinical Pearls

  • Polyendocrine Metabolic Ovarian Syndrome (PMOS)  is the updated terminology for Polycystic Ovary Syndrome (PCOS).
  • It is a common endocrine-metabolic disorder affecting reproductive-age women.
  • The main features are ovulatory dysfunction, hyperandrogenism, and polycystic ovarian morphology.
  • Ovarian cysts are not required for diagnosis.
  • Diagnosis requires 2 of 3 diagnostic features after exclusion of other causes.
  • Common symptoms include irregular periods, hirsutism, acne, and infertility.
  • Insulin resistance and hyperinsulinemia contribute to androgen excess.
  • Obesity and metabolic abnormalities are common but not required for diagnosis.
  • Screen for glucose abnormalities and cardiovascular risk factors.
  • Pelvic ultrasound may demonstrate polycystic ovarian morphology but is not always necessary.
  • Combined oral contraceptives are commonly used for menstrual irregularity and hyperandrogenism.
  • Letrozole is the preferred first-line ovulation-induction drug for infertility related to anovulation.
  • Metformin is particularly useful when metabolic abnormalities or diabetes/prediabetes are present.
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