When tests are useful

If you’re under 45 with symptoms, if your symptoms are unusual, or if you want to rule out other causes such as an underactive thyroid. Some women also like a baseline before talking to their GP about HRT.

Which hormones change

FSH tends to rise, oestradiol swings up and down, and progesterone falls as ovulation becomes less regular. Because levels change from month to month, one normal result doesn’t rule perimenopause out. The Perimenopausal Profile measures them together.

Don’t forget your thyroid

An underactive thyroid causes tiredness, low mood, weight gain and brain fog, just like perimenopause. A thyroid function test helps tell them apart.

Your long-term health

After menopause the risk of heart disease and osteoporosis rises, so cholesterol and bone health checks become more useful.

Getting help

Your GP can talk through HRT and other treatments. NHS guidance supports diagnosing perimenopause from symptoms in women over 45.

Please note: this guide is general information and doesn’t replace advice from your GP. If you feel very unwell, call NHS 111, or 999 in an emergency.

Tests mentioned in this guide

Women’s health