Early menopause and POI: when menopause comes before 40

Menopause before 45 is called early menopause; before 40 it is called premature ovarian insufficiency, or POI. Around one in a hundred women have POI under 40, and one in a thousand under 30. It can happen spontaneously or as a result of surgery (removing both ovaries) or treatment for another condition such as cancer.

POI is not a milder version of menopause. The symptoms are similar, but the medical priorities are different: at a younger age, the long-term consequences of low oestrogen for bones and cardiovascular health are greater, and the approach is replacement of what your body would still have been making, not just easing symptoms.

How it is diagnosed

Under 40, suspected POI needs more than symptoms to confirm it. The standard is two FSH blood tests at least four to six weeks apart, both above 25 IU per litre, alongside a clinical picture that fits. Other tests look for treatable contributors and assess long-term risk. POI usually warrants specialist input, and we arrange that alongside starting treatment so that fertility, bone, and cardiovascular care are joined up from the beginning.

Why the goal is replacement, not just symptom control

A woman of 30 with POI would normally have another two decades of ovarian oestrogen ahead of her. Replacing that oestrogen, with progesterone if she has a uterus, is about giving her body what it would still be producing, not about pushing levels above normal. Withholding HRT in POI is the opposite of conservative; in a young woman, low oestrogen accelerates bone loss and raises cardiovascular risk in ways that matter over decades. Current guidance is clear that HRT for POI is recommended unless there is a specific reason it cannot be given.

What the regimen looks like

The HRT itself is the same family of hormones used for menopause, but the doses are usually higher than the symptom-led adult menopause dose, and may go above the licensed dose range in order to reach physiological levels. That is appropriate and expected here. Body-identical estradiol and micronised progesterone are the usual backbone. A small dose of testosterone is commonly added, again in keeping with replacing what the ovaries would normally make. Treatment is usually continued at least until the average age of natural menopause, around 51, and the balance is reviewed regularly after that.

Bone and heart surveillance

Because oestrogen is so important to bone strength, women with POI usually have a DEXA bone density scan around the time of diagnosis and then every three years, more often if there are findings to follow. Cardiovascular risk reduction is built in from the start: blood pressure, lipids, weight and lifestyle measures all attended to actively. Adequate vitamin D and calcium intake, regular weight-bearing and resistance exercise, not smoking, and moderate alcohol are the everyday measures that go alongside HRT, not instead of it.

Fertility, sex life, and the emotional load

POI carries a fertility implication that menopause at the usual age does not. A small minority of women with POI do conceive spontaneously, but this is not something to plan on, and fertility advice should come from a specialist who can talk through donor egg options or other routes. Vaginal dryness and discomfort are common and very treatable, often with low-dose vaginal oestrogen alongside systemic HRT. The emotional weight of being told you are in menopause years before you expected is real and worth acknowledging; support, counselling, and time matter alongside the medical plan.

Specialist coordination

POI almost always benefits from input beyond a single clinician. Gynaecology may be involved for the diagnosis and ongoing review. Fertility specialists are involved if conception is wanted. Endocrinology may be involved if other hormone systems are affected. We coordinate care across these teams rather than work in isolation, and we keep your NHS GP in the loop so that bone, cardiovascular and screening care is joined up. Where another condition has caused POI (chemotherapy or surgery for cancer), care is shared with the oncology or surgical team.

When and how this changes over time

The plan in your twenties and thirties is not the plan you stay on forever. Around the age of natural menopause, the decision becomes the same as for any post-menopausal woman: review symptoms, weigh benefits and risks, decide whether to continue, taper, or stop. Many women continue on a lower dose for the same reasons others do at midlife. Vaginal oestrogen, if used for local symptoms, often continues long term because the underlying cause persists.

The honest summary

POI is different from menopause at the usual age. Treatment is replacement, usually at higher doses than midlife HRT, often above the licensed dose range, and continued at least until the average age of natural menopause. Bone and cardiovascular health are looked after proactively. Where fertility or oncology are in the picture, care is shared with the right specialists. If POI may apply to you, we assess and treat it as the protective, long-term plan that it is.

Ready to start?

If you want to move from reading to acting, the next step is a short assessment with a doctor on the GMC GP Register. It takes about ten minutes and tells you whether HRT is right for you.

Begin your assessment at this link. Online or in person at Westfield London.