What it measures
- Oestradiol (E2)
Who it’s for
- Irregular or absent periods
- Fertility investigations
- Perimenopause symptoms
- Monitoring HRT, if your doctor advises
What oestradiol does
Oestradiol is made mainly by your ovaries. It builds the womb lining, protects your bones and affects your mood, skin and sleep. Levels rise and fall through each cycle and peak before ovulation, so the day you test matters. Early-cycle levels are the most useful for comparing with FSH and LH.
In perimenopause
As you approach menopause, oestradiol can swing from high to low from one month to the next, which is why symptoms such as hot flushes, poor sleep and mood changes can come and go. One reading can’t confirm menopause, but it helps when read alongside FSH and your symptoms.
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.
When should I book?
How it works at our Croydon clinic
Book online
Choose your test and a time that suits you. No GP referral needed.
A 15-minute visit
A trained clinician takes a small blood sample at 169 Shirley Road, Croydon. Tell us if you’re nervous.
Results in 1–3 days
A clear report showing each result against its reference range.
Next steps
Share your report with your GP, who can arrange NHS follow-up if anything needs it.
Questions
Which day should I test?
Day 2 to 5 of your cycle unless your doctor has asked for a different day.
Can I test while using HRT?
Yes, if your doctor has asked for a level. Tell us what HRT you use and when you last took or applied it, as timing affects the result.
How much is a Oestradiol Test in Croydon?
£55 at our clinic at 169 Shirley Road, Croydon, including taking your blood sample and your report.
How quickly will I get my results?
Usually within 1 to 3 days, in a clear report showing each result against its reference range.