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 using HPLC/MS-MS and free estradiol using equilibrium dialysis, along with 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. This test does not diagnose any condition on its own.
2. Who would benefit from this test?
Women with menstrual irregularities, menopause symptoms, or fertility problems may benefit from this test. Women undergoing hormone replacement therapy may use it to monitor estradiol levels. Individuals with certain cancers, such as breast or ovarian cancer, may also benefit. Men with symptoms like gynecomastia or low libido may consider this test as well.
3. When should I order this test?
You might consider this test if you are experiencing irregular menstrual cycles, menopause symptoms, fertility issues, breast changes, low libido, mood changes, or unexplained weight changes. It may also be used to monitor estradiol levels during hormone replacement therapy. Talk to your healthcare provider about whether this test fits your situation.
4. How does this test differ from other hormone tests?
This test reports both total estradiol (measured by HPLC/MS-MS) and free estradiol (measured by equilibrium dialysis), plus 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 a test measuring only one form. This test does not measure other hormones or hormone-binding proteins.
5. Do I need to fast before this test?
No special preparation is required for this test.
6. How quickly will I get results?
Results are typically available in 9-12 days. This may take longer based on weather, holiday, or lab delays.
7. How do I interpret the results?
Interpreting your total and free estradiol results depends on factors such as your symptoms, medical history, sex, age, and any medications or supplements you take. Free and total estradiol reflect different aspects of hormone status and should be considered together rather than interchangeably. Estradiol results are 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 personalized 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.
8. What should I do if my results are abnormal?
If your results fall outside the expected range, review them with a qualified healthcare provider. They can help interpret your total and free estradiol levels in the context of your health history and symptoms. Additional evaluation or testing may be considered if recommended by your provider. This test result alone does not provide a complete clinical conclusion.
9. How often should I get tested?
Testing frequency depends on your individual health needs and should be determined by your healthcare provider. There is no standard testing schedule for this test. Follow your provider's guidance on when to retest as directed by your healthcare provider.
Pre test preparation
No special preparation is required.
