Estradiol (E2) Test
An estradiol test measures the most potent form of estrogen in the blood to assess reproductive health, fertility, and hormonal balance.
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What this test measures
Estradiol (E2) is the most biologically active form of estrogen, playing crucial roles in both reproductive health and many non-gender-specific processes including growth, nervous system maturation, bone metabolism, and cardiovascular function. The hormone is produced primarily in the ovaries in women and the testes in men, with smaller amounts made in the adrenal glands and fat tissue.
This test measures serum estradiol levels, which form an integral part of assessing reproductive function in both men and women, including evaluation of infertility, menstrual irregularities, and menopausal status. In addition to its reproductive roles, estradiol helps control fat distribution in the female body and is essential for bone and joint health in both sexes. The test provides valuable insights into hormonal balance and can help identify conditions ranging from fertility issues to hormonal deficiencies that may affect overall wellbeing.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Women experiencing irregular menstrual periods, heavy bleeding, or missed periods who want to understand their hormonal balance
- Individuals struggling with fertility issues or difficulty conceiving who need to assess reproductive hormone levels
- Women going through menopause or perimenopause experiencing symptoms like hot flashes, mood changes, or sleep disturbances
- Men experiencing unexplained symptoms like decreased energy, mood changes, or concerns about bone health
- People with symptoms that may indicate hormonal imbalances such as unexpected weight changes or changes in sex drive
- Individuals monitoring hormone replacement therapy or fertility treatments who need to track estradiol levels
What to expect
Preparation
No special preparation is needed for this test. You can eat normally and take medications as prescribed. However, inform your healthcare provider about any hormone medications or supplements you're taking.
Sample Type
A simple blood draw from a vein in your arm, similar to routine blood work
Collection
Visit any LabCorp location with your test order. Present a valid ID and have your blood drawn by a trained technician. The process takes just a few minutes.
Turnaround
Results are typically available within 1-3 business days and will be delivered securely to your online account
Understanding your results
Estradiol levels change dramatically throughout life, following predictable patterns that correspond to major hormonal milestones. Understanding these age-related changes helps distinguish between normal hormonal fluctuations and potential health concerns. Your results will be compared to reference ranges that are specific to your age and sex. It's important to note that women's estradiol levels fluctuate significantly during the menstrual cycle, so timing of the test may affect interpretation.
| Population | Reference Range | Notes |
|---|---|---|
| Premenopausal women (follicular phase) | 30-100 pg/mL | Levels vary throughout menstrual cycle |
| Premenopausal women (mid-cycle peak) | 100-400 pg/mL | Peak occurs around ovulation |
| Postmenopausal women | < 10-30 pg/mL | Significantly lower after menopause |
| Adult men | 10-40 pg/mL | Relatively stable throughout adult life |
Reference ranges shown are general guidelines. Your lab report will include the specific reference range used by the laboratory that processed your sample, which is the authoritative range for interpreting your results.
What does a “Low” result mean?
Low estradiol levels in women may suggest hypogonadism, ovarian dysfunction, or menopause. Very low levels in postmenopausal women and older men may be associated with increased risk of osteoporotic fractures.
What does a “High” result mean?
Elevated estradiol levels may indicate conditions such as polycystic ovarian syndrome, estrogen-producing tumors, or certain ovarian disorders. In men, higher than normal levels can be associated with conditions affecting hormone balance or metabolism.
Privacy & confidentiality
Your estradiol test results are completely confidential and delivered securely through your private online account. Results are never shared with employers, insurance companies, or other third parties without your explicit consent. We understand that hormone testing can feel personal, and we're committed to protecting your privacy throughout the entire process.
Frequently asked questions
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CPT Code: 82670
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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Not sure if this is the right test? Contact our care team for guidance.