Estrone Blood Test

E1 Estrogen Blood Test for Hormone Level Screening

The Estrone Blood Test, also called an E1 test, measures the amount of estrone in your blood.

Estrone is one of the main estrogen hormones. It is produced by the ovaries, adrenal-related hormone pathways, and adipose tissue. Estrone is especially important in postmenopausal estrogen evaluation because it may remain a major form of estrogen after menopause.

This test may be useful when a healthcare provider wants to evaluate estrogen status, menstrual changes, menopause-related symptoms, hormone therapy monitoring, infertility-related questions, or hormone imbalance concerns.

This service provides access to lab testing only. It is intended as a screening and monitoring tool and does not diagnose, treat, or replace care from a licensed healthcare provider.

✔ Measures Estrone, also called E1
✔ Useful for estrogen and hormone level screening
✔ Simple blood draw
✔ Doctor's order included
✔ No insurance required

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⏱ Typical turnaround: results are usually emailed in 1–3 days.

What This Test Measures

Estrone, E1

This blood test measures estrone, one of the three main estrogen hormones. The other major estrogens are estradiol, also called E2, and estriol, also called E3.

• Test name: Estrone
• Also known as: E1, Estrone Serum, Estrogen 1
• Sample type: Blood
• Purpose: Estrogen level screening
• Common use: Provider-directed hormone evaluation

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Why Order an Estrone Test?

• Menopause-related hormone evaluation - Estrone may be reviewed during menopause or postmenopause.
• Menstrual cycle concerns - May be ordered when evaluating abnormal cycles or bleeding patterns.
• Hormone therapy monitoring - May be used when a provider is monitoring estrogen-related therapy.
• Infertility or reproductive health evaluation - May support a broader hormone workup.
• Hormone imbalance concerns - May be reviewed with estradiol, FSH, LH, progesterone, testosterone, or other hormones.
• Provider-directed testing - Useful when your healthcare provider specifically requests estrone testing.

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Who May Consider This Test?

This test may be appropriate for:

• Individuals whose healthcare provider requested an estrone blood test
• Women evaluating menopause or postmenopausal hormone status
• People monitoring hormone replacement therapy with their provider
• Individuals with irregular menstrual cycles or abnormal bleeding concerns
• People being evaluated for fertility or reproductive hormone concerns
• Men being evaluated for estrogen-related hormone concerns, when requested by a provider
• Customers who want doctor-ordered estrone testing without using insurance

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Estrone vs Estradiol

Estrone and estradiol are both estrogen hormones, but they are not the same.

• Estrone, E1 - Often more relevant after menopause and may be influenced by adipose tissue.
• Estradiol, E2 - Often the dominant estrogen during reproductive years.
• Estriol, E3 - Often associated with pregnancy-related estrogen evaluation.

Your provider may order estrone alone or with other estrogen tests depending on your symptoms and testing goals.

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Timing and Interpretation

Estrone levels can vary by age, sex, menstrual cycle stage, pregnancy status, menopause status, body composition, medications, and hormone therapy.

If your healthcare provider wants testing on a specific cycle day or at a specific time, follow their instructions.

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Important Symptom Warning

If you have severe pelvic pain, heavy bleeding, pregnancy-related concerns, fainting, chest pain, shortness of breath, sudden neurological symptoms, severe abdominal pain, or any urgent medical concern, seek medical care promptly.

Do not use this estrone test as a substitute for urgent medical evaluation, diagnosis, or treatment.

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Important: Screening Only

LabReqs and SchoolTiters provide access to lab testing. We do not diagnose menopause, infertility, hormone imbalance, PCOS, estrogen dominance, cancer, pituitary disease, pregnancy complications, or any medical condition.

Results should be reviewed with a licensed healthcare provider, OB/GYN, endocrinologist, fertility specialist, or other qualified clinician.

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Important Limitations

• This test does not diagnose a medical condition by itself.
• Estrone results must be interpreted with age, sex, symptoms, cycle timing, medications, pregnancy status, and other hormone tests.
• This test does not include estradiol, estriol, FSH, LH, progesterone, testosterone, SHBG, or pregnancy testing unless ordered separately.
• Hormone therapy, birth control, supplements, and certain medications may affect results.
• Abnormal results may require repeat testing or additional evaluation.

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Before Ordering

• Confirm whether your provider requested estrone alone or a full estrogen panel.
• Ask whether testing should be done on a specific cycle day.
• Do not stop medications, birth control, supplements, or hormone therapy unless your provider tells you to.
• If you are pregnant, trying to conceive, or recently postpartum, ask your provider which hormone tests are appropriate.
• If you are unsure whether estrone testing is right for you, ask your healthcare provider before ordering.

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How It Works

1. Order online.
2. Receive your lab order. A doctor's order is included.
3. Visit a participating lab location.
4. Complete a simple blood draw.
5. Receive your results. Result timing may vary by lab, location, and processing requirements.

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Why Choose This Test?

✅ Measures Estrone, also called E1
✅ Useful for provider-directed estrogen and hormone evaluation
✅ Doctor's order included
✅ No insurance needed
✅ Convenient online ordering
✅ Results can be reviewed with your healthcare provider

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Frequently Asked Questions

What does an estrone blood test check?

An estrone blood test checks the level of estrone, also called E1, in your blood.

Is estrone the same as estradiol?

No. Estrone, E1, and estradiol, E2, are different estrogen hormones. Estradiol is often more dominant during reproductive years, while estrone may be more relevant after menopause.

Why would my provider order estrone?

Your provider may order estrone for hormone evaluation, menopause-related review, hormone therapy monitoring, menstrual concerns, fertility evaluation, or other endocrine questions.

Do I need to fast?

Fasting is usually not required unless your healthcare provider gives you different instructions.

Does this test diagnose hormone imbalance?

No. This test provides lab information only. Diagnosis and treatment decisions must be made by a licensed healthcare provider.

Does this include other estrogen tests?

No. This product measures estrone only. Estradiol, estriol, or fractionated estrogen testing must be ordered separately if needed.

Is a doctor's order included?

Yes. A doctor's order is included with this lab test.

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Order Your Estrone Blood Test

Use this test when you need estrone, E1, testing for estrogen level screening, hormone therapy monitoring, menopause-related evaluation, fertility discussions, or provider-directed hormone review.

Order your Estrone Blood Test today.