Oestrone
The Oestrone test measures E1, a form of oestrogen that becomes more prominent after menopause. It helps assess hormonal balance, especially when oestradiol levels are low.
Turnaround time
5 days
Biomarkers count
1
Book your test
Choose Service Type
Professional phlebotomist comes to you
+ £{{ home_visit_fee }}
Visit our clinic for your test
{{ clinic_visit_fee > 0 ? '+ £' + clinic_visit_fee : 'Free' }}
Home Visit Details
Home visits require at least 24 hours notice.
Select a clinic: Sorting by distance…
{{ clinic.full_address }}
{{ selectedClinic.full_address }}
Select a date
Select an hour
Available time slots: {{ timeSlots.length}}
Details about Oestrone
What is the Oestrone test?
The Oestrone (E1) test measures oestrone, one of the three main forms of oestrogen in the body (oestradiol, oestrone, and oestriol). Oestrone is produced mainly through the conversion of androgens in fat tissue and becomes the dominant oestrogen after menopause.
Unlike oestradiol (E2), which is the most potent oestrogen during reproductive years, oestrone has weaker oestrogenic activity but still plays an important role in overall hormonal balance. Measuring oestrone provides additional insight into oestrogen metabolism, particularly in postmenopausal women and in men.
Why do I need an Oestrone test?
Oestrone levels can help clarify oestrogen status when symptoms persist despite normal or low oestradiol levels.
You may benefit from this test if you:
-
Are perimenopausal or postmenopausal
-
Have menopausal symptoms with unclear hormone results
-
Are monitoring hormone replacement therapy
-
Have weight-related hormonal concerns
-
Are assessing oestrogen balance alongside testosterone (in men)
-
Have symptoms of oestrogen excess or deficiency
-
Need deeper insight into oestrogen metabolism
Testing helps differentiate sources of oestrogen and supports more accurate hormonal assessment.
Benefits of the test
-
Assesses postmenopausal oestrogen status
Oestrone is the main oestrogen after menopause. -
Complements oestradiol testing
Provides a fuller oestrogen profile. -
Useful in hormone therapy monitoring
Helps assess peripheral oestrogen conversion. -
Relevant in weight-related hormone changes
Fat tissue influences oestrone production. -
Supports male hormone balance assessment
Oestrone contributes to total oestrogen load. -
Improves interpretation of menopausal symptoms
Explains symptoms when E2 is low. -
Simple blood-based testing
Requires only one blood sample. -
Widely used in endocrine assessment
Standard component of advanced hormone evaluation.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
-
Choose your nearest UK clinic
-
Attend your appointment
-
Blood sample taken by a clinician
-
Sample sent to the laboratory
-
Results issued once analysis is complete
Home or hotel visit (+£60, UK-wide)
-
Mobile phlebotomist attends your location
-
Blood sample taken at home or hotel
-
Sample securely transported to the laboratory
Your results explained
Low oestrone
-
May be seen in low body fat, ovarian insufficiency, or suppressed oestrogen production
-
Can contribute to menopausal or hypo-oestrogen symptoms
Typical UK reference examples (vary by lab):
-
Postmenopausal women: <70 pmol/L
Normal oestrone
-
Indicates expected oestrogen conversion for age and menopausal status
-
Supports balanced oestrogen metabolism
High oestrone
-
May be associated with increased peripheral conversion in fat tissue
-
Can contribute to symptoms of oestrogen dominance
-
Relevant in hormone therapy monitoring
Results should be interpreted alongside oestradiol, testosterone, BMI, and clinical context.
How It Works
Simple steps to get your results
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.