Early menopause & premature ovarian insufficiency (poi)

In short: Early menopause is when your periods stop before the age of 45. Premature ovarian insufficiency (POI) is when your ovaries stop working normally before 40, so periods become irregular or stop and hormone levels drop. The key difference is that with POI, the ovaries can still work now and then, so some women still get occasional periods and can even get pregnant. Both need a doctor's care, because low hormones at a young age affect your bones and heart, not just your periods.

If your periods have gone quiet in your 20s, 30s or early 40s, this guide is for you.

Early menopause, premature menopause and POI: what's the difference?

These words get mixed up a lot. Here's the simple version:

• Menopause is when your periods stop for good because your ovaries no longer release eggs and hormone levels fall. The WHO says this usually happens between 45 and 55. It's confirmed after 12 months in a row without a period, with no other cause. Our guide to understanding menopause explains the stages in more detail.
• Early menopause is menopause before 45, according to the NHS.
• Premature menopause is menopause before 40.
• Premature ovarian insufficiency (POI) means the ovaries stop working normally before 40. The US National Institute of Child Health and Human Development (NICHD) explains that, unlike menopause, a woman with POI may still have periods, even if they're irregular, and may still get pregnant.

For Indian women, this matters a little more. The Indian Menopause Society's guidelines note that the average age of menopause in India is reported to be about 46, which is younger than in many Western countries.

How common is early menopause in India?

More common than many people realise. A 2024 analysis of the National Family Health Survey (NFHS-5, 2019–21) estimated that:

• about 2.2% of Indian women had premature menopause (before 40)
• about 16.2% of women aged 40 to 44 had early menopause

The same study linked early and premature menopause with lower education, poorer economic conditions, smoking, fried food consumption and starting periods early. These are links found in survey data, not proof that one causes the other.

Signs of early menopause and POI

The NHS lists the main sign as periods that become irregular or stop completely before 45. Other symptoms can include:

• hot flushes and night sweats
• vaginal dryness
• difficulty sleeping
• low mood or anxiety
• reduced sex drive
• problems with memory or concentration

Some women also find it hard to get pregnant, and that's how POI is first noticed.

Many of these signs are easy to blame on stress, a busy job, a new baby or "just hormones". That's one reason POI is often missed for a long time. If your periods have changed and you have any of these symptoms, it's worth asking a doctor. It can also help to know how menstrual changes can signal perimenopause, even in your late 30s.

What causes early menopause and POI?

Often, no clear cause is found. Known causes and risk factors include:

• Family history. The NHS says you're more likely to have early menopause if it runs in your family. NICHD notes that about 10% to 20% of women with POI have a family history of it.
• Starting periods early, smoking and being underweight. All are listed by the NHS as making early menopause more likely.
• Cancer treatment. Chemotherapy or radiotherapy can damage the ovaries.
• Surgery. Removing both ovaries brings on menopause straight away.
• Genetic conditions. Such as Turner syndrome or Fragile X, according to NICHD.
• Autoimmune conditions. Where the immune system attacks the body's own tissues, sometimes including the ovaries. NICHD notes that thyroiditis (an autoimmune thyroid condition) is the one most often linked with POI, and Addison's disease is linked too.

How is POI diagnosed?

If you're under 45 and have menopause symptoms, the NHS says a doctor may do blood tests.

Your doctor will usually:

• ask about your periods, symptoms, family history and any past treatment or surgery
• check for pregnancy, which is the most common reason for a missed period
• test hormones such as FSH (follicle-stimulating hormone) and oestrogen. POI is usually diagnosed when periods have been irregular or absent for at least 4 months and the FSH level is raised; your doctor may repeat the test a few weeks later to be sure
• check thyroid and other hormones to rule out other causes
• sometimes suggest genetic or autoimmune tests, or an ultrasound of your ovaries

Tracking your periods before your appointment makes this much easier. Note the dates of your last few periods and any symptoms in a period tracker. The menopause symptoms check on Femease's health checks can also help you describe what you're feeling.

Why early care matters: bones and heart

Oestrogen does a lot more than run your cycle. It helps keep your bones strong and supports heart health. The NHS says early or premature menopause raises the chance of osteoporosis (weak bones) and cardiovascular disease.

That's why it's important to see a doctor early, rather than waiting it out. Every woman's situation is different, and a doctor will explain the options for protecting your bones and heart and what is right for you.

Everyday habits support your bones and heart too. The NHS suggests regular exercise and calcium-rich food. In Indian kitchens, that can mean curd, paneer, milk, ragi, sesame (til) and green leafy vegetables. Not smoking also helps. If you're wondering whether you need a supplement, ask your doctor.

Fertility and POI

This is often the hardest part. Hearing "your ovaries have slowed down" in your 20s or 30s, perhaps before you've thought about children, can feel like a shock.

What's important to know:

• With POI, the ovaries may still work now and then, so pregnancy is still possible, though less likely. If you don't want to get pregnant, ask your doctor about contraception.
• If you do want children, see a fertility specialist early to talk about your options.
• If you're about to have cancer treatment, ask about fertility preservation before it starts.

The emotional side

Early menopause or POI can bring grief, anger, worry about the future, and a feeling of being "out of step" with friends who are planning pregnancies. Questions from relatives about "good news" can hurt.

These feelings are real and common. The NHS notes that early menopause can affect mental health as well as physical health. Talking to a therapist, a trusted friend, or other women who've been through it can help. You are not "less of a woman", and you didn't cause this.

When to see a doctor

Book a doctor consultation if:

• you're under 45 and your periods have become irregular or stopped
• you've missed 3 periods in a row and you're not pregnant
• you have hot flushes, night sweats or vaginal dryness in your 20s, 30s or early 40s
• you're struggling to get pregnant and your periods have changed
• you've had chemotherapy, radiotherapy or ovarian surgery
• your mother or sister had early menopause and you have symptoms

Questions women ask

What is the difference between early menopause and POI?

Early menopause means periods stop for good before 45. POI means the ovaries stop working normally before 40, but may still work now and then, so occasional periods and pregnancy are still possible.

At what age is menopause considered early?

The NHS defines early menopause as before 45 and premature menopause as before 40. In India the average age of menopause is reported to be around 46.

Can you get pregnant with POI?

Sometimes, yes. Because the ovaries can still release an egg occasionally, pregnancy is possible though less likely. Talk to a doctor about contraception or fertility options, depending on what you want.

What tests are done for POI?

A doctor will usually check for pregnancy and test hormones such as FSH, sometimes repeated a few weeks later, along with thyroid and other tests to rule out other causes. Sometimes genetic or autoimmune tests are suggested.

Is early menopause dangerous?

It isn't an emergency, but low hormones at a young age raise the risk of weak bones and heart disease over time. That's why it's important to see a doctor early, so they can explain the options for protecting your bones and heart.

Sources

• NHS: Early or premature menopause
• WHO: Menopause fact sheet
• NICHD (US National Institute of Child Health and Human Development): About primary ovarian insufficiency; POI causes
• Indian Menopause Society: Clinical practice guidelines on menopause, 2019–2020 (Journal of Mid-life Health, 2020)
• Kundu S, Acharya SS. Exploring the triggers of premature and early menopause in India: NFHS 2019–2021. Scientific Reports, 2024