A patient seated in the chair before a blood draw
In person

Estradiol

Your level of estradiol, the main estrogen, from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
Nothing to do ahead of time. Water is fine.
Results
1 to 3 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

Estradiol is the main estrogen the ovaries make before menopause. Levels rise and fall across the menstrual cycle, so the day you test matters. A healthcare provider can advise which cycle day to choose. Hormonal birth control and hormone therapy can change results.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

For adults with cycle changes, perimenopause, or fertility questions. It is usually read with other hormones and is designed for levels before menopause. Commonly related symptoms include:

Reproductive

  • Irregular periods
  • Missed periods

Mood

  • Mood changes
  • Trouble sleeping

Sexual

  • Low sex drive

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your result shows your estradiol level on the day of the draw, which a healthcare provider can read with your cycle timing and other hormones such as FSH.

Estradiol
Estradiol is the main form of estrogen during the reproductive years, made mostly by the ovaries. Levels change across the menstrual cycle and fall after menopause. A more sensitive method than this standard one is recommended when low levels are expected, such as in men or after menopause.
Why it’s measured: The main estrogen in the reproductive years; varies across the cycle.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting needed, and nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 1 to 3 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

Estradiol is reported as a number and compared with the lab’s reference range. Where you are in your cycle affects how it is read.

  • Your number next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

A healthcare provider reads estradiol with your cycle timing, symptoms, and other hormones, and decides whether any follow-up is needed.

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

Estradiol rises and falls across the menstrual cycle, so the same person can have very different results on different days. The right day depends on your question, such as cycle changes, fertility, or perimenopause.

A healthcare provider can advise which cycle day to test. If your periods are irregular or absent, ask them how to time it.

Yes. Hormonal birth control and hormone therapy can change estradiol levels, so your result may not reflect your own hormone pattern. Tell your healthcare provider about any hormone medicine you use. Don’t stop or change any medicine or supplement without talking with your healthcare provider.

This test is designed for the estradiol levels typical before menopause. It may be less precise at very low levels, such as after menopause or in men, where the lab recommends a more sensitive method.

If you expect a low level, ask a healthcare provider whether this test fits your question.

One estradiol result is a snapshot of a hormone that changes from day to day. It cannot tell you on its own whether you are in perimenopause or whether you can get pregnant. A healthcare provider reads it with your cycle history, symptoms, and other tests such as FSH.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.