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Serum or plasma concentration of **Estrogen (total)**

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

This test measures the total amount of estrogen hormones in your blood, which play a key role in women’s reproductive health and hormone balance.

Quick summary

["Estrogen levels help assess reproductive function, hormone-related conditions, and potential fertility issues."]

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

Key facts at a glance

LOINC
33542-2
Short code
GA Est from FL.Merz.88
Synonyms
GA Est from FL.Merz.88
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
estimated-from-fl-merz
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 This Test Is Done

Your doctor may order this test to evaluate symptoms like irregular periods, menopause signs, or to diagnose conditions such as polycystic ovary syndrome (PCOS), hormone imbalances, or certain cancers. It may also be used during pregnancy monitoring or before surgery involving hormone-sensitive tissues.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours if a blood draw is part of a metabolic or liver function panel. Wear a comfortable shirt for easy access to your arm.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a slight pinch, but the procedure usually takes less than five minutes. The blood sample is then sent to a lab for analysis.

Possible Results and Interpretation

Results are compared to a reference range that varies by age, sex, and health status. Low levels may indicate hormonal deficiencies or conditions affecting estrogen production, while high levels could signal tumors, liver disease, or other metabolic issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Total Estrogen Level

Frequently asked questions

What Does This Test Tell Us About My Health?
Estrogen levels help identify reproductive disorders, hormone-related cancers, or conditions affecting metabolism. For example, low estrogen in postmenopausal women may signal osteoporosis risk, while elevated levels could prompt further evaluation for thyroid or liver disorders.
How Long Will I Need to Wait for Results?
Results typically arrive within 1–3 business days, depending on lab processing times. Your doctor will discuss them with you during a follow-up visit.
Can Diet or Supplements Affect This Test?
Yes—phytochemicals (e.g., soy, flaxseed), certain medications (e.g., birth control, antidepressants), and hormonal supplements can influence estrogen levels. Avoid these 2–3 days before testing if possible.
  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