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FSH (Follicle Stimulating Hormone) with Serum/plasma Concentration Measurement

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

This test measures the amount of follicle-stimulating hormone (FSH) in your blood. FSH plays a key role in hormone regulation, particularly in reproductive health.

Quick summary

["FSH helps manage fertility and hormone balance, often checked in reproductive health evaluations."]

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

Key facts at a glance

LOINC
57098-6
Short code
FSH 1.5h p GnRH SerPl-aCnc
Synonyms
FSH 1.5h p GnRH SerPl-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
3.5
Ref high
12.5
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83001
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 if you have symptoms or conditions related to hormone imbalances, such as irregular menstrual periods, infertility, or signs of early menopause. It may also be used to monitor treatment for hormone-related disorders.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves blood drawn from a vein. Wear comfortable clothing and plan to stay near a testing facility for a short time.

How the Test Is Performed

A healthcare professional will draw blood from a vein in your arm using a needle. You may feel a small pinch, but it usually doesn’t cause discomfort afterward. The blood sample is sent to a lab for analysis.

What the Results Mean

Results can vary based on age, sex, and medical history. High or low FSH levels may indicate conditions like polycystic ovary syndrome (PCOS), ovarian reserve issues, or other hormonal imbalances. Your provider will discuss findings with you.

Reference range

Follicular: 3.5-12.5 mIU/mLN/A

Specimen: serum

For females: inform if menstrual cycle status. For certain tests, timing within menstrual cycle may matter.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

FSH Level

Frequently asked questions

How long does it take to get my FSH test results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your healthcare provider will contact you to discuss the findings.
Can lifestyle changes affect FSH levels?
Yes, factors like stress, diet, weight, and certain medications can influence hormone levels. Maintaining a healthy lifestyle and discussing your symptoms with your provider can help clarify any potential impacts.
Is fasting required for this test?
No fasting is usually required unless your provider specifies otherwise. Blood is drawn at a convenient time for you, but timing may vary based on your health status.
  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