Perimenopause Blood Test in Croydon

What it measures

• Oestradiol
• Progesterone
• FSH
• LH
• TSH
• Free T4

Who it’s for

• Irregular periods in your 40s
• Hot flushes, night sweats or poor sleep
• Low mood, anxiety or brain fog
• Symptoms before the age of 45

Perimenopause or something else?

Tiredness, low mood, brain fog, weight gain and poor sleep can be caused by perimenopause, but also by an underactive thyroid, which becomes more common in midlife. Testing both in one sample helps you and your GP see the full picture.

What the results can show

In perimenopause your hormones fluctuate, sometimes widely from one month to the next. A raised FSH with lower oestradiol supports the change, but a normal result doesn’t rule it out. The NHS diagnoses perimenopause in women over 45 mainly from symptoms; tests are most useful if you’re under 45, your symptoms are unusual, or you want to understand what’s happening before talking to your GP about HRT.

How to prepare

• If you have periods, book for day 2 to 5 of your cycle (day 1 is the first day of full bleeding). If your periods are irregular or have stopped, any day is fine.
• Stop biotin (vitamin B7) supplements, often found in hair, skin and nail products, 48 hours before.
• No fasting needed. Eat and drink as normal.

How it works at our Croydon clinic

1. Book online

   Choose your test and a time that suits you. No GP referral needed.

2. A 15-minute visit

   A trained clinician takes a small blood sample at 169 Shirley Road, Croydon. Tell us if you’re nervous.

3. Results in 1–3 days

   A clear report showing each result against its reference range.

4. Next steps

   Share your report with your GP, who can arrange NHS follow-up if anything needs it.

Questions