Menopause Blood Test Results Explained: FSH, Oestradiol and When to Test

2 days ago

2 min read

Short answer: if you are over 45 and have typical symptoms, UK guidance (NICE) says perimenopause and menopause can usually be diagnosed from your symptoms alone, without a blood test. Hormone tests such as FSH are most useful if you are under 45, if your symptoms are unusual, or to check other causes such as thyroid problems or low iron.

Why hormone levels can be misleading

During perimenopause, FSH and oestradiol rise and fall from week to week. A single normal result does not rule perimenopause out, and a single high result does not prove it. Results are also unreliable if you take the combined contraceptive pill or HRT.

When a blood test is worth doing

You are aged 40 to 45 with symptoms such as irregular periods, hot flushes or night sweats
You are under 40 and your periods have become irregular or stopped, which needs checking for premature ovarian insufficiency
Your symptoms could have another cause, for example an underactive thyroid, low iron or vitamin D
You want a baseline before starting HRT, for example cholesterol and blood sugar

What the main results mean

FSH: rises as the ovaries slow down. A raised FSH on two tests a few weeks apart supports perimenopause or menopause in the right age group.
Oestradiol: varies widely through the cycle, so it is read alongside FSH and your symptoms.
LH, thyroid (TSH), ferritin and vitamin D: help to rule out other causes of tiredness, low mood and changes to your periods.

What to do next

Our perimenopause and menopause blood test checks the key hormones together with thyroid and other common causes of symptoms. If you already have results, or want to talk through symptoms and treatment options such as HRT, you can book a private clinician consultation with our Advanced Clinical Practitioner, by phone UK-wide from £50 or face to face in Crewe. Read more about our menopause and HRT service.

Frequently asked questions

Can a blood test tell me if I am perimenopausal?

Not on its own. Because hormones fluctuate, perimenopause is diagnosed mainly from your age and symptoms. Tests help in younger women and to rule out other causes.

When in my cycle should I have the test?

If you still have periods, an early-cycle sample (days 2 to 5) is usually preferred. If your periods are irregular or have stopped, you can test on any day.

Do I need a test before starting HRT?

Not usually to confirm menopause if you are over 45 with typical symptoms, but a clinician may check blood pressure, cholesterol or other markers depending on your history.