Early Menopause and Primary Ovarian Insufficiency (POI): Symptoms and Treatment
Article written by Dr Mari Walling, British Menopause Society Registered Specialist, GP, Co-founder of Lemala Health, February 2026
This information is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider for personal guidance.
Early menopause and primary ovarian insufficiency (POI) can feel unexpected and overwhelming. Symptoms may affect both physical and emotional health, but effective treatment and support are available.
In this guide, we explain the causes, symptoms and treatment options, and how to protect your long-term health.
At Lemala Health, we help women navigate early menopause and POI with accurate information, personalised care, and practical strategies to manage symptoms and long-term health.
What is early menopause and POI?
Menopause is defined as the point in time when a woman has not had a menstrual period for 12 consecutive months.
The average age for menopause in the UK is 51 years.
Menopause under 45 years is considered early menopause.
Menopause under 40 years is called premature ovarian insufficiency (POI).
POI occurs when your ovaries no longer work properly before the age of 40. Your ovaries may produce fewer hormones and eggs, causing periods to stop or become irregular.
Unlike the natural menopause, ovarian function in POI can fluctuate, meaning occasional periods, ovulation, or even pregnancy can still occur. Around 5–15% of women with POI may conceive after diagnosis.
Prevalence: Approximately 4 in 100 women under 40 in the UK have POI, and at least 1 in 1,000 women under 30 are affected.
What causes POI?
For most women, the exact cause is unknown, but possible factors include:
Surgical menopause: Removal of ovaries (premature surgical menopause).
Cancer treatments: Radiotherapy or certain chemotherapy drugs.
Hysterectomy: Removal of the womb, which can lower ovarian hormone levels earlier than usual.
Autoimmune conditions: e.g. Type 1 diabetes, Thyroid disease, Addison’s disease.
Genetic conditions: Most commonly Turner syndrome, or family history of POI or early menopause.
What are the symptoms of POI?
Symptoms can vary and may come and go, as some ovarian function may remain. The most common sign is stopped periods, but others include menopause symptoms:
Hot flushes and night sweats
Fatigue or poor sleep
Low libido
Brain fog or memory changes
Joint pain
Hair and skin changes
Mood changes: low mood, anxiety, or irritability
Genitourinary symptoms (GSM): vaginal dryness, discomfort during sex, urinary changes
One in four women with POI may not have noticeable symptoms, so irregular periods are an important signal.
Experiencing menopause earlier than expected can affect both your physical and emotional health - but help and treatment are available.
Fertility and POI
Fertility is often a concern for women with POI. Because ovarian function can fluctuate, some women may still ovulate occasionally, meaning pregnancy is possible even after diagnosis. Around 5–15% of women with POI may conceive naturally.
However, for many, fertility declines earlier than expected, and options such as egg freezing, in vitro fertilisation (IVF), or egg donation may be needed. Early discussion with a menopause or fertility specialist is important to explore reproductive goals and make informed decisions.
How is POI diagnosed?
POI is diagnosed when:
1. Periods are irregular or absent for at least 4 months, and
2. A blood test shows high FSH and low oestrogen
Other tests, such as AMH, genetic, or autoimmune panels, may be performed to explore causes.
Diagnosis should be sensitive and supportive, giving you clear information and time to ask questions.
Long-term health considerations
Early menopause or POI can affect many aspects of health, beyond just hormone levels. Understanding these effects can help women take proactive steps to protect their long-term wellbeing.
Bone health
Loss of oestrogen, progesterone, and testosterone increases the risk of osteoporosis and fractures. Bones gradually lose density, making even minor stresses more likely to cause breaks.
Cardiovascular health
Hormones play a vital role in protecting blood vessels and heart function. Early menopause increases the risk of heart disease, high blood pressure, and stroke.
Metabolic health
Women may have a higher likelihood of insulin resistance and type 2 diabetes due to early hormone loss.
Brain and cognitive health
Early hormone changes can affect memory, concentration, and mental clarity. There is also some evidence that premature menopause may increase the risk of cognitive decline or dementia later in life.
Emotional and mental health
Anxiety, low mood, grief, or guilt are common, particularly when fertility is affected.
Sexual and urogenital health
Vaginal dryness, discomfort, urinary urgency, and recurrent infections are common.
Eye, skin, and hair health
Hormone changes can contribute to dry eyes, thinning hair, and changes in skin elasticity.
Overall wellbeing
Energy levels, sleep quality, and overall quality of life can be affected.
Treatment options
Menopausal symptoms and long-term health risks in early menopause or POI are primarily related to hormone loss. Treatment focuses on replacing missing hormones, managing symptoms, and supporting overall wellbeing.
Hormone Replacement Therapy (HRT)
HRT is the cornerstone of treatment for women with early menopause or POI. It replaces oestrogen, progesterone, and sometimes testosterone, helping to relieve symptoms such as hot flushes, night sweats, low mood, low libido, and brain fog.
HRT also protects bone, heart, and cognitive health when started early and continued until at least the average age of natural menopause (around 51 years in the UK).
HRT and the combined oral contraceptive pill containing ethinyl estradiol would both be suitable options for hormone replacement, although HRT may be more beneficial in improving bone health and cardiovascular markers compared to the combined oral contraceptive pill.
Women with POI may need higher doses of oestrogen than women experiencing menopause at the average age. This is very much on an individual basis after discussion with a specialist.
Read more about oestrogen and progesterone treatment options in further guides.
Vaginal and Urogenital Support
Vaginal oestrogen or DHEA can improve vaginal dryness, discomfort during sex, urinary symptoms, and recurrent infections. These local therapies are low-dose and mostly act locally, making them safe to use alongside systemic HRT. Lubricants and moisturisers can also provide symptom relief.
Read more in about in our genitourinary syndrome of menopause (GSM) guide.
Testosterone Therapy
For women experiencing reduced libido, testosterone therapy may be considered in addition to HRT.
Lifestyle Measures
A healthy lifestyle supports both symptom management and long-term health:
Diet: Balanced, nutrient-rich, and calcium-adequate. (read our supplement guide)
Exercise: Weight-bearing and aerobic activity for bone, heart, and metabolic health.
Sleep & stress management: Prioritising restorative sleep, mindfulness, and stress reduction.
Avoiding smoking and limiting alcohol: Reduces cardiovascular and bone risks.
Emotional and Psychological Support
Counselling, therapy, or peer support can help manage anxiety, sadness, or grief associated with early menopause.
Fertility concerns may require specialised fertility counselling or discussion of reproductive options.
Monitoring & follow-up
Regular follow-up with a healthcare professional specialising in menopause or hormone health ensures:
HRT doses remain effective and safe
Bone density, cardiovascular, and metabolic health are monitored
Symptoms and wellbeing are regularly reviewed
Summary
Early menopause or POI can affect multiple aspects of health, fertility, and quality of life. Combining personalised hormone therapy, lifestyle measures, fertility guidance, and emotional support allows women to reduce long-term risks and maintain wellbeing. Early intervention and ongoing monitoring are key to optimising outcomes.