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Estrogen Substance Concentration in Serum or Plasma

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of estrogen, a key hormone in women’s reproductive health, in your blood.

Quick summary

["Estrogen levels help assess reproductive function, hormone balance, and potential health risks."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
70207-6
Short code
Estrogen SerPl-sCnc
Synonyms
Estrogen SerPl-sCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
17
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your healthcare provider may recommend this test to evaluate symptoms like irregular periods, menopause signs, or fertility issues. It can also check for conditions like polycystic ovary syndrome (PCOS) or hormone-related cancers.

What to Expect Before the Test

No special preparation is needed, but avoid smoking or drinking alcohol 24 hours before testing. Wear comfortable clothing for blood draws.

How the Test Works

A small blood sample is taken from a vein in your arm. The sample is sent to a lab to measure estrogen concentration using an immunoassay method.

What the Results Mean

Results are compared to general reference ranges for your age and sex. High or low levels may signal underlying health concerns that need further evaluation.

Reference range

NCBI: NSE 0-17 ng/mLN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Estrogen Levels

Frequently asked questions

What causes estrogen levels to change?
Estrogen levels fluctuate naturally with age, menstrual cycle, pregnancy, or menopause. Medications, weight, and certain health conditions (e.g., thyroid disorders) can also affect them.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time.
Can diet or supplements affect estrogen levels?
Yes, foods rich in phytoestrogens (e.g., soy products) or supplements like black cohosh may influence estrogen. Always discuss potential interactions with your provider.
  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 17, 2026. · Read our editorial policy