Premature ovarian failure

https://www1.racgp.org.au/ajgp/2026/april/premature-ovarian-insufficiency-diagnosis-and-mana

Definition

Premature ovarian insufficiency (POI) is reduced or absent ovarian function occurring before age 40 years.

It is characterised by:

Oligomenorrhoea or amenorrhoea
Biochemical evidence of ovarian insufficiency
Reduced fertility or infertility
Variable symptoms of oestrogen deficiency

Key concept:

Ovarian activity may be intermittent
Spontaneous ovulation and pregnancy can still rarely occur
“Premature ovarian failure” is no longer preferred terminology

POI differs from:

Early menopause = menopause age 40–45 years
Natural menopause = usually age 45–55 years

Epidemiology

POI affects ~4% of women
Early menopause affects ~12%
Increasing prevalence partly due to:
- Chemotherapy
- Radiotherapy
- Ovarian/pelvic surgery

Why POI Matters

POI has major implications for:

Fertility
Bone health
Cardiovascular risk
Sexual function
Genitourinary health
Psychological wellbeing
Long-term cognition and health outcomes

Important:

Diagnosis is frequently delayed
Australian studies report diagnostic delays up to ~1.9 years

Pathophysiology

POI reflects:

Depletion of ovarian follicles, or
Dysfunction of remaining follicles

This results in:

Reduced oestradiol production
Loss of normal ovulation
Loss of negative feedback on the hypothalamic-pituitary axis
Elevated FSH levels

Intermittent ovarian activity may still occur.

Causes

Spontaneous / Non-Iatrogenic Causes

Often idiopathic (most common).

Genetic / Chromosomal

Turner syndrome
Fragile X premutation (FMR1)
X chromosome abnormalities

Autoimmune

Autoimmune thyroid disease
Addison disease
Type 1 diabetes
Pernicious anaemia
Coeliac disease
SLE
Rheumatoid arthritis
Vitiligo
Alopecia areata
IBD

Infectious

Mumps oophoritis

Environmental / Lifestyle

Smoking
Heavy metals
Pesticides
Industrial chemicals
PFAS/BPA exposure

Other Associations

Family history
PCOS
Early menarche
Short menstrual cycles
Low BMI

Family history may increase risk 2–18 fold.

— – — – – – — – — – – – — – — – – – — – — – – – — – — – – – — – — – – – — – — – – –

Iatrogenic Causes

Surgery

Bilateral oophorectomy
Ovarian surgery
Endometriosis surgery
Pelvic surgery

Cancer Treatment

Chemotherapy
Pelvic radiotherapy

Risk depends on:

Age at treatment
Radiation field
Chemotherapy dose/type
Baseline ovarian reserve

Important Clarification

The following do NOT cause POI:

COCP
Fertility treatment
MHT/HRT

However:

They may mask menstrual irregularity
POI may become apparent after cessation of hormonal therapy

Clinical Features

Menstrual Symptoms

Oligomenorrhoea
Secondary amenorrhoea
Primary amenorrhoea
Irregular cycles

Oestrogen Deficiency Symptoms

Hot flushes
Night sweats
Sleep disturbance
Mood changes
Vaginal dryness
Dyspareunia
Reduced libido
Urinary urgency/frequency
Recurrent UTI-type symptoms

Fertility Symptoms

Difficulty conceiving
Infertility
Unexpected low ovarian reserve markers

Psychological Features

Anxiety
Depression
Grief
Fear of ageing
Concerns regarding fertility
Reduced confidence/body image distress

When to Suspect POI

Consider POI in women aged <40 years with:

Oligomenorrhoea
Amenorrhoea ≥4 months
Infertility
Vasomotor symptoms
Vaginal dryness
Dyspareunia
History of ovarian surgery
Chemotherapy/radiotherapy exposure
Features of autoimmune disease
Turner syndrome features

Important:

Symptoms may be absent
Some women present only with infertility or menstrual disturbance

Differential Diagnosis of Amenorrhoea

Physiological / Reproductive

Differential	Why important
Pregnancy	Most common cause of secondary amenorrhoea
Lactational amenorrhoea	Physiological prolactin-mediated suppression
Pubertal immaturity	Immature HPO axis in adolescents

Ovarian Causes

Differential	Key clues
POI	Elevated FSH, vasomotor symptoms
PCOS	Hyperandrogenism, obesity, insulin resistance
Ovarian damage post surgery/treatment	History of chemo/surgery

Hypothalamic Causes

Differential	Key clues
Functional hypothalamic amenorrhoea	Stress, weight loss, excessive exercise
Eating disorder / low energy availability	Low BMI, restrictive eating
Excessive exercise	Endurance training
Psychological stress	Major life stressors
Kallmann syndrome	Anosmia, delayed puberty

Pituitary Causes

Differential	Key clues
Hyperprolactinaemia	Galactorrhoea
Prolactinoma	Headache, visual symptoms
Hypopituitarism	Multiple pituitary hormone deficits

Thyroid / Endocrine Causes

Differential	Key clues
Hypothyroidism	Fatigue, constipation
Hyperthyroidism	Tremor, palpitations
Cushing syndrome	Central obesity, striae
CAH	Hirsutism, androgen excess
Androgen-secreting tumour	Rapid virilisation

Uterine / Outflow Tract Causes

Differential	Key clues
Asherman syndrome	Previous uterine instrumentation
Cervical stenosis	Cyclic pain
Müllerian agenesis	Primary amenorrhoea
Androgen insensitivity syndrome	Sparse pubic hair, absent uterus

Chronic Disease Causes

Differential	Key clues
Coeliac disease	Iron deficiency, GI symptoms
Diabetes	Metabolic dysfunction
Chronic inflammatory disease	Weight loss, fatigue
Liver/kidney disease	Systemic illness

History

Menstrual History

Age at menarche
Cycle pattern
Duration of amenorrhoea
Last spontaneous menstrual period
Primary vs secondary amenorrhoea
Fertility history
Previous contraception
Previous hormonal therapy

Menopausal Symptoms

Ask about:

Hot flushes
Night sweats
Sleep disturbance
Vaginal dryness
Dyspareunia
Reduced libido
Mood changes

Risk Factor History

Genetic / Family

Early menopause
POI
Turner syndrome
Fragile X history
Male relatives with intellectual disability

Iatrogenic

Chemotherapy
Radiotherapy
Ovarian surgery
Endometriosis surgery
Pelvic surgery

Autoimmune

Thyroid disease
Addison disease
Type 1 diabetes
Coeliac disease
Autoimmune disorders

Lifestyle / Hypothalamic

Smoking
Low BMI
Excessive exercise
Eating disorder
Significant stress

Environmental

Pesticides
Heavy metals
Industrial chemical exposure

Examination

General Examination

Assess:

BMI
Weight
Blood pressure
Waist circumference
Cardiovascular risk factors
Signs of chronic illness
Signs of malnutrition/eating disorder

Oestrogen Status

Assess for:

Vaginal atrophy
Thin vaginal mucosa
Reduced breast tissue
Signs of hypo-oestrogenism

Signs Suggesting Alternative Diagnoses

Finding	Possible diagnosis
Short stature/webbed neck	Turner syndrome
Hirsutism/acne	PCOS
Goitre/tremor	Thyroid disease
Galactorrhoea	Hyperprolactinaemia
Hyperpigmentation	Addison disease
Purple striae	Cushing syndrome

Diagnosis

Current Diagnostic Criteria (2024 Guideline)

Diagnosis can be made if ALL are present:

Age <40 years
Oligomenorrhoea or amenorrhoea ≥4 months
FSH >25 IU/L

Repeat FSH after 4–6 weeks if:

Diagnostic uncertainty
Borderline results
Ongoing intermittent ovarian activity suspected

Important update:

Older threshold of FSH >40 IU/L is no longer required

Important Diagnostic Points

FSH does NOT need to be measured on a specific cycle day
Low oestradiol supports diagnosis but is not mandatory
Hormonal contraception may suppress FSH
Specialist input may be required if testing while on hormonal therapy

Initial Investigations

Core Tests

FSH
LH
Oestradiol
β-hCG
TSH
Prolactin

Interpretation of Initial Results

Result	Interpretation
High FSH	Suggests ovarian insufficiency
Low/normal FSH	Consider hypothalamic, pituitary or PCOS causes
Low oestradiol	Supports hypo-oestrogenism
Elevated prolactin	Consider hyperprolactinaemia/pituitary disease
Abnormal TSH	Thyroid disease may explain menstrual disturbance
Small ovaries/absent follicles on USS	Supports POI but not diagnostic alone

Consider Additional Tests Depending on Context

Autoimmune Screening

Thyroid antibodies
Coeliac serology
Morning cortisol ± ACTH
HbA1c/glucose

Genetic Testing

Karyotype
FMR1 premutation testing

Metabolic / General

FBC
UEC
LFT
Vitamin D
Iron studies

Bone Health

DEXA scan

Fertility / Ovarian Assessment

AMH
Pelvic ultrasound

Note:

AMH is NOT first-line for diagnosing POI.

AMH may help when:

FSH is borderline
FSH and clinical picture do not match
Diagnostic uncertainty remains

Important points:

Undetectable AMH supports POI
AMH should NOT replace clinical assessment and FSH-based diagnosis
AMH is more useful for predicting ovarian response in assisted reproduction than predicting spontaneous conception

Management Principles

Management should be:

Patient-centred
Multidisciplinary
Focused on long-term health protection

GP Roles in POI

Key GP roles include:

Early recognition
Diagnosis
Education and counselling
Hormone therapy initiation/coordination
Bone and cardiovascular risk reduction
Fertility counselling
Psychological support
Sexual/genitourinary symptom management
Long-term follow-up
Referral coordination

Long-Term Risk Assessment

Assess:

Blood pressure
Weight/BMI
Waist circumference
Smoking status
Fasting lipids
Glucose or HbA1c
Vitamin D
Bone mineral density (DXA)
Cardiovascular risk
Psychological wellbeing
Sexual/genitourinary symptoms
Fertility wishes

Explaining the Diagnosis

Important counselling points:

The ovaries are not functioning normally before age 40
This may cause irregular periods, infertility and low-oestrogen symptoms
Ovarian activity may still be intermittent
Spontaneous ovulation and pregnancy can still rarely occur
Treatment is important for both symptoms and long-term health
The diagnosis can be emotionally distressing and support is available

Hormone Therapy (HT/MHT)

Main Principles

Hormone therapy is first-line unless contraindicated.

Treatment should:

Start promptly after diagnosis
Be individualised
Use shared decision-making
Continue until at least average menopause age (~51 years)

Benefits of HT

Benefits include:

Vasomotor symptom relief
Improved vaginal/genitourinary symptoms
Bone protection
Cardiovascular protection
Improved sexual wellbeing
Improved quality of life and long-term health

Suggested Oestrogen Doses in POI

Women with POI often require higher replacement doses than women with natural-age menopause.

Oestrogen option	Suggested minimum dose
Oral estradiol	≥2 mg daily
Transdermal estradiol patch	≥100 micrograms
Estradiol gel	Equivalent systemic dose

These doses are particularly important for:

Bone protection
Symptom control

Progestogen Requirement

If uterus present:

Oestrogen MUST be combined with progestogen
Prevents endometrial hyperplasia/cancer
Higher oestrogen doses may require adequate progestogen dosing

Mirena can be used:

For endometrial protection
Alongside systemic oestrogen

When Transdermal Oestrogen is Preferred

Consider transdermal therapy if:

Migraine
Increased VTE risk
Liver disease
Malabsorption
Higher cardiometabolic risk

COCP in POI

COCP may be useful because it provides:

Oestrogen replacement
Contraception

Important points:

Often used continuously or long-cycle
Better evidence exists for 30 microgram ethinyl estradiol pills
Less evidence for:
- 20 microgram EE pills
- Estetrol-containing pills in POI

Contraception in POI

Important:

Standard MHT/HRT is NOT contraception

If pregnancy not desired, contraception is required.

Options

Option	Role
COCP	Hormone replacement + contraception
Mirena + systemic oestrogen	Contraception + endometrial protection + oestrogen
POP/implant/depot	Contraception only
Copper IUD	Contraception only
Barrier methods	Less reliable contraception

Important:

Mirena, not Kyleena, is used for endometrial protection with systemic oestrogen
Replace every 5 years

Fertility Counselling

Discuss fertility early and sensitively.

Key points:

Infertility commonly causes major distress
Spontaneous pregnancy occurs in <10%
More likely:
- Soon after diagnosis
- With lower FSH levels
No established therapy restores fertility

Potential options:

Oocyte donation
Embryo donation
Adoption
Fertility preservation before gonadotoxic treatment

Refer early if pregnancy desired.

Bone Health

Why Bone Health Matters

POI increases risk of:

Osteopenia
Osteoporosis
Fragility fractures

Mechanism:

Early oestrogen deficiency

Bone Health Management

Advise:

Adequate systemic oestrogen replacement
Weight-bearing exercise
Resistance exercise
Smoking cessation
Healthy weight
Limit alcohol
Adequate calcium
Adequate vitamin D

DXA Recommendations

Perform baseline DXA at diagnosis
Repeat in 1–3 years if low BMD present
If BMD normal and adequate HT maintained:
- Repeat DXA within 5 years often low value

Australian note:

MBS item 12312 may apply for female hypogonadism >6 months before age 45 years

Refer for Bone Health if

Refer to endocrinology if:

HT contraindicated
Fragility fracture while on HT
BMD declines >5% or >0.05 g/cm²
Complex osteoporosis management needed

Cardiovascular Health

Women with POI have increased risk of:

Coronary artery disease
Heart failure
Stroke

Management:

HT unless contraindicated
Monitor BP
Monitor weight/waist circumference
Lipids
HbA1c/glucose
Smoking cessation
Healthy diet/exercise

Annual review:

BP
Weight
Waist circumference
Smoking status

Genitourinary Symptoms

Symptoms may include:

Vaginal dryness
Dyspareunia
Urinary urgency/frequency
Recurrent UTI-type symptoms

Management:

Systemic HT
Vaginal oestrogen
Vaginal moisturisers
Lubricants
Pelvic floor physiotherapy

Important:

Vaginal oestrogen may still be needed even with systemic HT

Sexual Health

Sexual symptoms are often multifactorial.

Assess:

Desire
Arousal
Pain
Mood
Relationship factors
Body image
Pelvic floor dysfunction
Vaginal dryness

Management may include:

Optimising HT
Vaginal oestrogen
Lubricants/moisturisers
Psychosexual counselling
Pelvic floor physiotherapy
Consider transdermal testosterone for HSDD where appropriate

Psychological Support

POI can cause substantial psychological distress.

Assess for:

Anxiety
Depression
Grief
Fertility distress
Relationship strain
Sexual distress
Body image concerns

Offer:

Written information
Follow-up
Counselling
Psychology referral
Peer support
Fertility counselling

Providing information improves:

Self-management
Quality of life

Non-Hormonal Therapies

Consider if HT contraindicated/not tolerated.

Options for vasomotor symptoms:

CBT
Hypnosis
SSRIs
SNRIs
Gabapentin
Oxybutynin
Fezolinetant

Important:

Evidence mainly derived from usual-age menopause
Complementary therapies remain unproven
Should NOT replace HT in POI

Healthy Lifestyle Advice

Advise:

Smoking cessation
Regular exercise
Resistance and weight-bearing exercise
Healthy diet
Healthy weight
Adequate calcium/vitamin D
Limit alcohol
Optimise sleep
Address stress and mental health

Referral Pathways

Referral	Indication
Gynaecologist	Diagnostic uncertainty, HT complexity, abnormal bleeding
Endocrinologist	Osteoporosis, endocrine causes, adrenal antibodies
Fertility specialist	Pregnancy desired, fertility preservation
Genetic counselling	FMR1 premutation, Turner syndrome
Psychologist/counsellor	Anxiety, grief, depression
Sexual therapist	Sexual dysfunction
Pelvic floor physiotherapist	Dyspareunia, pelvic floor dysfunction
Dietitian/exercise physiologist	Bone/cardiometabolic support

Follow-Up

Review regularly for:

Symptom control
HT adherence
Side effects
Bleeding pattern
Contraception needs
Fertility wishes
Mood/psychological wellbeing
Sexual function
Vaginal/urinary symptoms
BP
Weight
Waist circumference
Smoking status
Lipids
HbA1c/glucose
Bone health/DXA timing