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Estrogen (Total) with Immunoassay Method

Published: August 9, 2026Updated: August 16, 2026

This test measures the total amount of estrogen hormones in your blood. Estrogen is a key hormone in women and some men, influencing fertility, bone health, and overall well-being.

Quick summary

["Estrogen levels help doctors assess reproductive health and potential hormone-related conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
63959-1
Short code
Estrogen admin method CTS
Synonyms
Estrogen admin method CTS
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
california-teachers-study
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test to evaluate symptoms like irregular periods (in women), low libido, or signs of hormonal imbalances. It can also help diagnose conditions like polycystic ovary syndrome (PCOS), ovarian dysfunction, or hormone-related cancers.

What Does the Test Involve?

A blood sample is taken from a vein in your arm. The sample is then analyzed using an immunoassay method to detect and quantify total estrogen levels in your bloodstream.

What Are Common Reasons for Testing?

This test is often used during fertility evaluations, before or during hormone replacement therapy, to monitor menopause-related symptoms, or to check for hormonal disorders.

What Might Affect Results?

Factors like recent menstrual cycles, pregnancy, certain medications (e.g., birth control pills), or stress can influence estrogen levels. Avoiding certain foods, supplements, or smoking for a few days before testing may improve accuracy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Estrogen Level

Frequently asked questions

How soon after my blood draw can I expect results?
Results are typically available within 24 to 72 hours, depending on lab processing times. Your healthcare provider will contact you once they are ready to discuss the results with you.
Can I eat or drink anything before this test?
You can eat and drink normally before the test unless instructed otherwise by your doctor. Avoiding alcohol or certain medications for a few days may help ensure more accurate results.
Is there anything I should do to prepare for this test?
No special preparation is usually needed, but inform your healthcare provider about any medications you’re taking, recent illnesses, or if you’re pregnant. Wear comfortable clothing for the blood draw.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy