Early menopause and POI: what it means when your ovaries stop working too soon

Most information about the menopause focuses on women aged 48 to 55. However, for some women, this process begins much earlier—at 35, 38, or 42. And for some, menstruation even stops before the age of 40. This has different causes, a different risk profile, and different treatment needs than the average menopause.

Early menopause, premature menopause, and POI: terms explained

Early menopause is menopause that occurs before the age of 45. The ovaries stop functioning earlier than average, but the process is similar to a typical menopause.

Primary Ovarian Insufficiency (POI) is the term for the cessation or significant reduction of ovarian function before the age of 40. POI is not menopause in the classic sense—some women with POI still ovulate sporadically, which does not completely rule out pregnancy but makes it very difficult.

POI affects approximately 1-2% of women. The emotional impact is often significant: the diagnosis comes unexpectedly, sometimes coincides with a desire to have children, and affects women at a stage in life when menopause is usually not on the radar.

What causes early menopause or POI?

• Genetic factors: certain gene mutations (including BRCA gene mutations and FMR1 premutations) increase the risk of POI. Women whose mother or sister went through menopause early are also at an increased risk themselves.
• Autoimmune: the immune system attacks ovarian tissue. This is sometimes associated with other autoimmune diseases such as Addison's disease, celiac disease, or thyroid disorders.
• Medical treatment: chemotherapy and radiation in the pelvic area can permanently damage ovarian function. This is also known as iatrogenic menopause.
• Surgery: surgical removal of both ovaries (bilateral oophorectomy) causes immediate menopause—often with severe symptoms because it is abrupt.
• Chromosomal abnormalities: such as Turner syndrome (45,X0) are associated with insufficient ovarian development.
• Idiopathic: in some women with POI, no cause is found.

Why early menopause increases risk

The earlier ovarian function declines, the longer the period of estrogen deficiency — and the greater the cumulative damage to bones, blood vessels, and the brain.

• Osteoporosis: women with early menopause or POI have a significantly higher risk of osteoporosis and fractures at a young age. Every month without estrogen replacement therapy represents lost bone mass.
• Cardiovascular risk: estrogen protects blood vessels. Women who reach menopause before age 40 have a significantly higher risk of cardiovascular disease than their peers.
• Cognitive risk: some studies suggest an increased risk of long-term cognitive decline in women who function without estrogen for an extended period.
• Reduced life expectancy: epidemiological research shows that women with early menopause have a shorter average life expectancy than women who reach menopause at the normal age — unless they receive treatment.

HRT for early menopause: a necessity, not a choice

In cases of early menopause and POI, HRT is not just an option — it is the medically recommended standard. All major professional organizations (IMS, BMS, ESHRE) are in agreement: women who reach menopause before age 45 should receive hormone therapy until at least the average age of menopause (51), unless there are specific contraindications.

The reason is simple: HRT for early menopause replaces a deficiency that would not normally exist at that age. It restores hormone levels to what is physiologically normal for that age — it does not raise them above that level.

With POI, the dosages required are often higher than for standard postmenopausal HRT, because the body is accustomed to higher hormone levels at a young age. This requires a specialized physician with experience in this area.

Pregnancy after POI

Although POI significantly reduces fertility, it does not completely rule out pregnancy. Spontaneous ovulation still occurs in 5-10% of women with POI. Anyone wishing to have children should discuss this with a fertility specialist. HRT does not further suppress ovarian function — but it does protect the rest of the body in the meantime.

The emotional impact

A diagnosis of early menopause or POI is a heavy blow. At an age when most friends are not experiencing menopausal symptoms, you suddenly have to process the fact that your body is hormonally decades older. In addition, the desire for children may be lost or put under pressure.

Psychological support alongside medical treatment is not an afterthought — it is an integral part of quality care for POI. Peer support can also be valuable: organizations such as the POI-vereniging Nederland offer contact with other women in the same situation.

When to see a GP or specialist?

Seek medical advice if you are under 45 and:

• Your period has been absent for more than three months without pregnancy
• You are experiencing hot flashes, sleep problems, or mood swings at a young age
• You have a family history of early menopause
• You have undergone chemotherapy or pelvic radiation

A diagnosis of POI requires two FSH blood tests (taken more than one month apart) above 40 IU/L, combined with the absence of menstruation for more than four months before the age of 40.

At Menovia we also support women with early menopause and POI. This approach requires extra attention and often higher dosages — and that is exactly the personalized care we provide. Schedule a screening if you suspect you are in early menopause.