Quick Facts
- Sample: Blood
- Fasting: No special preparation is required
- Turnaround: 9-12 days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
This test measures both free and total estradiol in your blood, along with the percentage of estradiol that is free. Total estradiol, reported as Estradiol, Serum, MS, is measured using HPLC/MS-MS. Free estradiol, the portion not bound to proteins, is measured using equilibrium dialysis, a method used to separate free hormone from protein-bound hormone. The free estradiol percentage is also reported.
Estradiol is a form of estrogen. Because most estradiol in the blood is bound to proteins, the total measurement and the free measurement can provide different information about circulating hormone levels. Reporting both values, along with the free percentage, gives your healthcare provider a more detailed picture of your estradiol status than a single measurement alone. This test does not measure other hormones, hormone-binding proteins, or endocrine markers beyond those listed.
Benefits
- Reports total estradiol using HPLC/MS-MS methodology
- Reports free estradiol using equilibrium dialysis
- Includes the free estradiol percentage
- Supports evaluation of hormone-related symptoms
- Helps track estradiol levels during hormone therapy
- Uses advanced laboratory techniques for accuracy
Who Is This Test For?
- Women with menstrual irregularities
- Women experiencing menopause symptoms
- Individuals with fertility problems
- Women undergoing hormone replacement therapy (HRT)
- Individuals with certain cancers, such as breast or ovarian cancer
- Men with symptoms of hormonal imbalance, such as gynecomastia or low libido
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this hormone test?
This test measures total estradiol, free estradiol, and the free estradiol percentage. Estradiol is a form of estrogen important for reproductive health and other body functions. These measurements may help a healthcare provider evaluate hormone-related symptoms and conditions, but they do not diagnose any condition on their own.
2. Who may benefit from this test, and when should it be ordered?
This test may be appropriate for women with menstrual irregularities, menopause symptoms, fertility problems, breast changes, mood changes, or unexplained weight changes. It may also be used to monitor estradiol during hormone replacement therapy or as part of an evaluation for certain cancers, such as breast or ovarian cancer. Men experiencing symptoms such as gynecomastia or low libido may also consider this test. A healthcare provider can determine whether it is appropriate for your situation.
3. How does this test differ from other hormone tests?
This test reports total estradiol measured by HPLC/MS-MS and free estradiol measured by equilibrium dialysis, along with the free estradiol percentage. Total estradiol reflects the overall amount in your blood, while free estradiol reflects the portion not bound to proteins. Reporting both provides more detail than measuring only one form. The test does not measure other hormones or hormone-binding proteins.
4. Do I need to prepare for this test?
No special preparation is required.
5. How quickly will I receive my results?
Results are typically available within 9–12 days. They may take longer because of weather, holidays, or laboratory delays.
6. How do I interpret the results?
Interpretation depends on your symptoms, medical history, sex, age, and any medications or supplements you take. Free and total estradiol represent different aspects of hormone status and should be considered together rather than interchangeably. Results are also often reviewed alongside other clinical information. One abnormal result does not automatically confirm a hormonal condition, and one normal result does not rule one out. Discuss your results with a qualified healthcare provider for personalised interpretation.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
7. What should I do if my results are abnormal?
Review results that fall outside the expected range with a qualified healthcare provider. They can interpret your total and free estradiol levels in the context of your health history and symptoms and determine whether additional evaluation or testing is appropriate.
8. How often should I get tested?
There is no standard testing schedule for this test. Your healthcare provider should determine when retesting is appropriate based on your individual health needs.
Pre test preparation
No special preparation is required.
