Early menopause and premature ovarian insufficiency

Key takeaways

• The NHS calls menopause before 45 "early". Before 40, doctors use the term premature ovarian insufficiency.
• POI is diagnosed when periods have stopped or become infrequent for over four months and FSH is raised on two tests four to six weeks apart, according to the British Menopause Society.
• The NHS stresses that it is important to replace missing hormones if menopause starts before 45, to protect bones and heart.
• In POI, the ovaries can still work occasionally, so pregnancy is possible though unlikely. Hormone therapy is not a contraceptive.
• Fertility options exist, with donor eggs being the most effective once POI is established.

What counts as early?

In data cited by the Indian Menopause Society, the average age of natural menopause in Indian women is about 46.7 years, a few years earlier than in many Western countries. So we need to be very clear about what is early and what is not.

The word "insufficiency" is chosen on purpose for women under 40. I explain it like a tube light that is flickering, not one that has been switched off. The ovaries have not always fully stopped. Some women have occasional periods, and a small number conceive naturally.

What causes it?

Often no single cause is found, and I always tell women: it's not their fault. Known causes and risk factors include:

• Surgery to remove both ovaries, sometimes along with a hysterectomy (see menopause after a hysterectomy)
• Chemotherapy or pelvic radiotherapy
• Autoimmune conditions, where the immune system affects the ovaries, sometimes alongside thyroid disease
• Genetic conditions, such as changes in the X chromosome
• Family history of early menopause
• Smoking and being underweight, which the NHS lists as risk factors
• Certain hormone medicines used for other conditions

If you are under 40, your specialist may suggest tests for genetic and autoimmune causes. This matters not only for you, but sometimes for your sisters and daughters too.

How is it diagnosed?

For women under 40, the British Menopause Society describes the diagnosis as:

• Periods that have stopped or become infrequent for more than four months, and
• A raised FSH level (above 40 IU/L) on at least two blood tests taken four to six weeks apart

NICE guidance also says POI should not be diagnosed on a single blood test, and that AMH (a hormone often used to estimate egg reserve) should not be used routinely. NICE suggests that FSH testing may be considered for women aged 40 to 45 with menopausal symptoms, including a change in their cycle.

Other tests may include thyroid function, prolactin, a pregnancy test, and a pelvic ultrasound. A baseline DEXA bone scan is often recommended at diagnosis.

See, I'll tell you why I take this so seriously. In my years of fertility work, I have seen how a diagnosis of POI can land like a shock, often on a woman in her 30s who was planning a family. It deserves time, clear explanation and support. Not a quick prescription and a "come back in six months".

Why does hormone replacement matter so much here?

After a natural menopause at 51, treatment is mainly about symptoms. With POI or early menopause, it is also about protecting your long-term health. You are not adding something extra. You are giving back what your body would normally still be making at your age.

The British Menopause Society notes that women with POI have a higher risk of heart disease, osteoporosis and cognitive problems, and that hormone replacement is likely to reduce these risks. The NHS says it is important to replace missing hormones if menopause starts before 45.

How long? NICE and the British Menopause Society advise continuing until at least the natural age of menopause, unless there is a medical reason not to. After that, the decision is reviewed like any other woman's.

Which treatment? The options include hormone replacement therapy or the combined contraceptive pill. The British Menopause Society notes that hormone therapy may be more beneficial for bone and heart markers, and that skin patches or gels are unlikely to increase clot risk, so they are often considered for women at higher risk. Estradiol and micronised progesterone are common choices, but the type, dose and route are prescription decisions made after assessment.

Is breast cancer a worry? The British Menopause Society notes that observational data suggest hormone therapy does not appear to increase breast cancer risk in women with POI under 50, because you are replacing hormones you would normally have. Women who have had breast cancer need a different plan with their oncologist.

Can I still have a baby?

This is very often the first question, and it deserves an honest answer.

• The British Menopause Society estimates the chance of natural conception after POI diagnosis at about 5 to 10%, because the ovaries can work intermittently.
• IVF using your own eggs is unlikely to succeed once POI is established.
• Egg donation is the most effective fertility option.
• For women at risk who have not yet lost ovarian function, such as before chemotherapy or with a strong family history, egg or embryo freezing may be considered.

If you do not want to conceive, use contraception. NICE is clear that hormone replacement therapy is not a contraceptive. The combined pill provides both hormone replacement and contraception in suitable women.

What else should I do?

• Bones: calcium-rich foods (milk, curd, paneer, ragi, til), vitamin D checked and corrected, and regular strength training. See bone health after 40.
• Heart: yearly blood pressure, sugar and cholesterol checks. See menopause and heart health.
• Mind: an early menopause can bring grief, anxiety or a feeling of losing your identity. The NHS notes possible effects on mental health. Talking to a counsellor helps, and so does bringing your partner into the conversation.
• Stop smoking.
• Review yearly with your doctor.

How I approach this at Dr Tvacha

At Cocoon × Dr Tvacha in Thane West, I bring my background in fertility and hormones to women with early menopause and POI. Within The Right Stop Programme, I take a detailed history, order only the tests needed (including DEXA where indicated), explain every option, and fix review dates from day one. Partners are welcome in the consultation.

Written by

Dr Anagha KarkhanisGynaecologist and Fertility Specialist · Reg. No. 2006/02/1187

Leads midlife women's health at Cocoon × Dr Tvacha, Thane.