What is primary ovarian failure?
Discover the symptoms, causes, diagnosis and treatment options in this clear, expert guide to reproductive health.
What Is Primary Ovarian Failure?
If you’re searching for clear, trustworthy information about primary ovarian failure, you’re in the right place. Also known as premature ovarian insufficiency (POI), this condition affects about 1 in 100 women under 40. It can be confusing, distressing and often misunderstood.
Primary ovarian failure occurs when the ovaries stop functioning properly before the age of 40, leading to reduced oestrogen levels, irregular periods, and difficulties with fertility. It’s not the same as early menopause, although the two terms are sometimes used interchangeably. Crucially, with POI, ovarian function may fluctuate – which means pregnancy is still possible in some cases.
What Does Primary Ovarian Failure Mean?
In simple terms, primary ovarian failure means the ovaries no longer produce normal amounts of hormones – particularly oestrogen – and may not release eggs regularly. This affects your menstrual cycle, fertility, and long-term hormonal balance.
Key features of POI:
- Irregular or missed periods (amenorrhoea)
- Low levels of oestrogen
- High levels of follicle-stimulating hormone (FSH)
- A hormone produced by the pituitary gland in the brain that stimulates the ovaries to produce an egg.
- Possible fertility challenges
Unlike menopause, which marks the permanent end of menstruation, women with POI may still ovulate sporadically and could occasionally conceive naturally.
What Causes Primary Ovarian Failure?
For approximately 90% of women with POI, the cause remains unknown. It is rare to occur in teenage years but occasionally the ovaries start to fail in women even in their teens and twenties.
Several factors can contribute, including:
Genetic causes:
These are chromosomal abnormalities meaning the number of chromosomes in your body is not the normal 46XX for women—that is, 46 chromosomes and 2 X chromosomes that confirm that your sex is female at birth.
Turner syndrome (45X0):
Puberty may be absent or incomplete, short stature in teenage years (20% less than general population), short or webbed neck, low set ears, broad chest, widely spaced nipples, short fingers and toes. This may not be apparent until puberty. The womb and ovaries don’t develop properly and once diagnosed women with Turner Syndrome need to go on hormone therapy. Unfortunately the majority of pregnancies in women with Turner Syndrome end in miscarriage.
Fragile X premutation:
This is a change in a gene on the X chromosome and causes similar symptoms to menopause. 20% of women with Fragile X premutation will have POI at a young age.
Other chromosomal abnormalities
Autoimmune conditions:
- Autoimmune oophoritis (where the body attacks ovarian tissue) – this is very rare.
- Often linked with thyroid disorders, Type 1 Diabetes or Addison’s disease
Medical treatments:
- Chemotherapy or radiotherapy
- Surgery that removes the ovaries before the age of 40 years old
- This could be due to ovarian cancer, gene carriers for ovarian cancer, ovarian cysts, endometriosis, severe PMS/PMDD. These surgeries are usually planned in advance and HRT should be recommended prior to surgery.
Other factors:
- Infections (rare): Mumps, TB or Malaria
- Environmental toxins
- Smoking and poor general health (increased risk but not direct causes)
🧬 Important: If POI is diagnosed, genetic testing and screening for autoimmune diseases may be recommended.
What Are the Symptoms of Primary Ovarian Failure?
Symptoms can develop gradually or appear suddenly. Some women may not notice anything until they try to conceive, while others may experience:
- Irregular or skipped periods
- Hot flushes or night sweats
- Vaginal dryness or discomfort
- Mood swings or irritability
- Difficulty concentrating (“brain fog”)
- Fatigue
- Loss of libido
- Fertility challenges
⚠️ If you’re under 40 and your periods have stopped or become irregular, speak to your GP. It’s always worth checking.
How Is Primary Ovarian Failure Diagnosed?
Diagnosis typically includes:
- Medical history and symptoms review
- Blood tests to measure hormone levels, especially:
- FSH (typically high in POI)
- Oestrogen (typically low)
- AMH (Anti-Müllerian Hormone – may be low); this is a blood marker of how many eggs are left in the ovaries
- Pelvic ultrasound to check the ovaries and uterus
- Genetic and autoimmune testing, if appropriate
A diagnosis is usually confirmed when FSH levels are consistently elevated in women under 40, combined with irregular or absent periods for at least four months.
Living With Primary Ovarian Failure
Being diagnosed with POI can bring up a range of emotions: grief, confusion, anger and fear are all common. It’s more than just a medical diagnosis – it’s deeply personal. Support is available. Many women grieve the baby that they were not able to have.
Common concerns include:
🌱 Fertility
While spontaneous ovulation is possible, it may be unpredictable. Options include:
- Fertility preservation (if POI is due to cancer treatment)
- Egg donation and IVF
- Adoption or surrogacy
Hormone Replacement Therapy (HRT)
Because low oestrogen affects bone health, cardiovascular health and mood, HRT is usually recommended until around age 50, unless medically unsuitable. This isn’t about delaying menopause – it’s about replacing what your body would naturally produce at your age.
🧠 Mental and emotional wellbeing
Many women report feeling isolated after a POI diagnosis. Support groups, counselling, and talking therapies can make a big difference.
Is There a Cure for Primary Ovarian Failure?
There is currently no cure for POI, but symptoms can be managed and fertility options explored. Key treatments and lifestyle changes include:
- Hormone replacement therapy to protect heart and bone health
- Calcium and vitamin D for bone support
- Exercise and diet to maintain overall health
- Mental health support to manage the emotional impact
- Regular check-ups with your GP or gynaecologist
For more information and support, visit The Daisy Network, a charity dedicated to women with POI. or the HSE website.
Final Thoughts: You Are Not Alone
Primary ovarian failure is a life-altering diagnosis, but it’s not the end of the road. With the right support and treatment, many women go on to lead full, healthy lives – physically, emotionally and sexually.
If you’re concerned about your symptoms or just want to understand more, take that first step: speak to your GP, get tested, and don’t be afraid to ask questions. You deserve answers and support.
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