PATIENT GUIDE
When ovarian function changes before 40, you may be facing questions about symptoms, health and fertility at the same time. A clear diagnosis and a practical plan can help you take the next step.
EARLIER OVARIAN CHANGE
Premature ovarian insufficiency (POI), also called primary ovarian insufficiency, means the ovaries are working less consistently before age 40. Periods may stop or become irregular, with or without flushes, disrupted sleep or vaginal symptoms. Menopause between 40 and 44 is usually called early menopause.
POI can be a difficult diagnosis to receive, especially if pregnancy is part of your plans. There is time to ask questions and return to the discussion. It does not mean you caused the problem. In spontaneous POI, ovarian activity can sometimes return temporarily; the term “insufficiency” reflects that uncertainty.
DIAGNOSIS
We review at least several months of cycle changes, symptoms, pregnancy possibility, medicines, ovarian surgery and cancer treatment. Pregnancy and other explanations for absent periods, including thyroid or prolactin disorders, may need checking.
The 2024 international guideline uses irregular or absent natural cycles for at least four months and an FSH level above 25 IU/L. Repeat FSH after four to six weeks if there is uncertainty. A low oestradiol result can support the picture; diagnosis does not depend on a low oestradiol result. AMH is not the first diagnostic test.
Some guidance, including NICE, still describes two raised FSH results. The history, current treatment and certainty of the findings determine whether repeating a test is useful. You may therefore receive an individual testing plan.
Hormonal contraception and HRT can change bleeding and hormone results. Do not stop either on your own to arrange tests. Removal of both ovaries before 40 establishes the cause without needing repeated hormone tests; hysterectomy with ovaries retained is different.
CAUSES & ASSOCIATED CONDITIONS
Sometimes no cause is found. Testing can still help identify associated health needs or information relevant to family members. We discuss the implications, availability and costs before proceeding.
For POI not caused by medical treatment, the international guideline recommends chromosome analysis and FMR1 premutation testing. Genetic counselling explains what the results could mean for you and relatives; age within the POI range should not by itself prevent testing.
Thyroid function is checked. When the cause is unknown, adrenal autoantibody testing can identify who needs an endocrinology assessment. These are targeted investigations, not a general “autoimmune” or ovarian-antibody panel.
Removal of both ovaries causes an immediate loss of ovarian function. Chemotherapy and radiotherapy may have temporary or lasting effects. Your treatment record, age and cancer type help determine follow-up and whether hormone treatment is suitable.
TREATMENT & DAILY LIFE
Unless contraindicated, hormone replacement is usually recommended until the usual age of natural menopause, even if symptoms are mild. It supports bone and wider health as well as comfort. Risk estimates for starting HRT in the 50s do not directly describe a young woman replacing hormones lost early.
Estradiol through the skin or by mouth can be considered. The dose must provide adequate replacement for POI, rather than simply copying a low-dose prescription used much later in life. If you have a uterus, sufficient progestogen is essential to protect its lining. We review side effects and suitability together.
HRT is not contraception. Spontaneous ovulation is still possible in some forms of POI. A suitable contraceptive can be used alongside HRT, or a combined contraceptive may be an alternative for some women. If the combined pill is chosen, an extended or continuous schedule may be advised to avoid regular hormone-free intervals.
Local vaginal treatment can help dryness or pain even when systemic replacement is adequate. Distressing low desire, persistent sleep problems and mood symptoms deserve their own assessment. See the HRT guide → and vaginal comfort and sexual symptoms →.
A history such as hormone-sensitive cancer needs specialist discussion. Non-hormonal symptom treatment and a specific bone-health plan remain important. Do not assume every cancer history has the same restrictions.
HEALTH OVER TIME
A baseline bone-density scan (DXA) is recommended where available. Follow-up scans depend on the first result, treatment and other risks; annual scanning is not automatic. Low bone density or a fracture may need specialist input. Medicines used for osteoporosis require particular care if pregnancy remains possible.
At review, discuss blood pressure, smoking, cholesterol and diabetes risk, movement and nutrition. Aim for regular weight-bearing activity and strength work suited to your ability. Food is the preferred source of calcium; supplements are considered for shortfalls or deficiency.
Agree who will review each result. At least annual clinical review helps check hormone use, bleeding, symptoms and changing health needs. Arrange earlier advice for new or troublesome symptoms.
FERTILITY & SUPPORT
POI substantially reduces natural fertility, but occasional ovulation can occur in spontaneous POI. A return of a period does not prove the condition has resolved. No treatment has reliably been shown to restore ovarian activity or natural conception; be cautious about claims for ovarian “rejuvenation”, supplements or guaranteed results.
If pregnancy is wanted, ask for fertility advice early. Donor-egg IVF is an established option; other possibilities depend on your circumstances and preferences. Before chemotherapy or ovarian surgery, discuss fertility preservation where feasible. Once POI is established, opportunities to preserve your own eggs may be limited.
Pregnancy planning should include your general health and the cause of POI. Some genetic conditions and previous cancer treatments need additional checks. Emotional support can address grief, uncertainty, relationships or decisions about parenthood without assuming that everyone wants a pregnancy.
A PLAN TO REVIEW
Bring your cycle timeline, previous blood tests, operation or oncology records and current treatment. Record two or three priorities: symptom relief, pregnancy planning, sexual comfort or understanding longer-term health. Ask which results are pending, who will explain them and what happens if treatment does not suit you.
Back to contents ↑WHEN TO SEEK HELP
Seek emergency care for collapse, severe chest pain, sudden breathlessness, or possible pregnancy with severe one-sided pain, shoulder-tip pain or faintness. Severe weakness and vomiting need urgent assessment, particularly with known adrenal disease.
Report unexpected vaginal bleeding, a new breast lump, or a new persistent vulval sore. Do not wait for a routine hormone review or use the appointment form for an emergency.
COMMON QUESTIONS
No. Ovarian activity can fluctuate and treatment can affect results. Interpretation depends on the cycle history, medicines and the rest of the assessment.
Please discuss this first. In POI, replacement has health purposes beyond symptom relief. We can review side effects or find another suitable approach.
Care changes over time. Around the usual menopause age, we review the next hormone and health plan with you rather than using an automatic stop date.
YOUR NEXT STEP
Bring previous results, the names or photographs of your medicines and your main questions. You do not need to arrange tests before booking.
Back to contents ↑General information to support your consultation. Your assessment and prescription are individual.
Page updated: .
Sources & further reading: International POI guideline, 2024 → · NICE menopause guidance →