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Estrogen, Total (Serum)

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, affecting fertility, bone health, and other bodily functions.

Quick summary

["Your total estrogen levels help doctors assess reproductive health and check for hormonal imbalances."]

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

Key facts at a glance

LOINC
63960-9
Short code
Estrogen admin method use CTS
Synonyms
Estrogen admin method use 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?

Doctors may order a total estrogen test to evaluate symptoms like irregular periods, breast changes, or signs of perimenopause/menopause. It can also help diagnose conditions like polycystic ovary syndrome (PCOS) or hormone-related cancers.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours if your blood is drawn early in the morning. Wear a comfortable shirt for easy access to your arm.

How the Test Works

A healthcare provider will draw blood from a vein in your arm. The sample is sent to a lab, where it’s analyzed using an immunoassay method to measure total estrogen concentration.

What the Results Mean

Results are compared to general reference ranges for your age and sex, but individual needs vary. High or low levels may signal underlying health concerns that require further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Elevated estrogen levels may indicate conditions like ovarian tumors, liver disease, or hormone therapy use, while very low levels could suggest premature menopause, ovarian failure, or certain genetic disorders. Always discuss results with your provider for personalized interpretation.

Short name

Total Estrogen

Frequently asked questions

What causes my estrogen levels to fluctuate?
Estrogen levels naturally rise and fall due to your menstrual cycle, pregnancy, menopause, or hormonal medications. Stress, weight changes, and certain medications (like birth control or antidepressants) can also affect them.
Do I need to avoid certain foods before this test?
No specific diet restrictions apply, but avoid alcohol for 24 hours before testing, as it may interfere with lab results.
Can I take my usual medications before the blood draw?
Yes, but inform your provider about all medications (including supplements) you’re taking, as some may impact hormone levels.
  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