Perimenopause Blood Tests: What the NICE & NHS Guidance Says

Perimenopause is the transitional phase before menopause when hormone levels and menstrual cycles begin to change. Many women in their 40s and early 50s experience symptoms such as fatigue, hot flushes, mood changes, disrupted sleep and irregular periods. Understanding these changes can be challenging, hence why many women turn to blood tests for answers, especially that these are available on a private basis now. 

However, it is important that any testing is grounded in clinical evidence and recognised guidance. Here we summarise what NICE (National Institute for Health and Care Excellence) and the NHS recommend about testing in perimenopause.

Clinical Guidance on Perimenopause & Testing

According to the NICE guideline on menopause (NG23), perimenopause and menopause in women aged 45 or over should usually be identified based on symptoms, not laboratory tests. The guideline specifically states that changes such as vasomotor symptoms (e.g., hot flushes) and a change in menstrual cycle are often enough to make a diagnosis without blood testing. (NICE)

NHS resources also explain that blood tests are not normally required to diagnose perimenopause for most women, and that a clinical assessment is often sufficient. (nhs.uk)

When Blood Tests Can Be Helpful

While routine testing is not recommended for women over 45, there are situations where blood tests can still provide useful information:

Younger women (under 45) with symptoms
In women under 45, especially those with unclear or severe symptoms, certain blood tests can help rule out other conditions or support a clinical picture. Tests like FSH (follicle-stimulating hormone) may be considered in this context. (Practice Nurse)

To rule out other causes of symptoms
Symptoms like fatigue or mood changes can come from conditions such as thyroid dysfunction, iron deficiency or vitamin D deficiency. Targeted blood tests for these conditions may help clarify the underlying causes.

In cases of unclear diagnosis
For women with complex health histories, on hormonal contraception, or who have had a hysterectomy, certain tests may be useful in addition to a thorough clinical assessment.

What Blood Tests Do, and Do Not, Tell You

It is important to set expectations:

Blood tests can help rule out other conditions that may cause similar symptoms.
In younger women, they may offer useful clinical information when symptoms are ambiguous.

Blood tests do NOT provide a definitive diagnosis of perimenopause for most women aged 45 and over, because hormone levels fluctuate widely during this transition and are not reliable markers on their own. (NICE)

A Balanced & Evidence-Based Approach

At London Health Company, we follow clinical guidance and support women with evidence-based testing designed to complement, not replace, clinical assessment. Our perimenopause panel focuses on tests that:

Help rule out other medical causes of symptoms

Support informed discussions with clinicians

Provide a clearer picture of your overall health

We do not promote blood tests as a standalone diagnostic tool for perimenopause in women aged 45 or over.

Next Steps if You’re Experiencing Symptoms

If you’re experiencing symptoms that affect your daily life, we recommend:

Keeping a symptom diary; tracking changes over time can help clarify patterns.

Discussing your symptoms with a healthcare professional: especially if they’re impacting your quality of life.

Considering targeted tests as part of a broader health assessment.

The NHS provides helpful resources on menopause support here:
👉 NHS Menopause Help & Support  https://www.nhs.uk/conditions/menopause/help-and-support/ (nhs.uk)

References

NICE guideline NG23: Menopause – Identification & Management  https://www.nice.org.uk/guidance/ng23/ (NICE)

NICE Quality Standard on diagnosing perimenopause and menopause  https://www.nice.org.uk/guidance/qs143/ (NICE)

NHS overview on menopause support  https://www.nhs.uk/conditions/menopause/help-and-support/ (nhs.uk)