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FSH (Follicle Stimulating Hormone) - 24-Hour Urine Collection

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

This test measures the total amount of follicle-stimulating hormone (FSH) excreted in your urine over a 24-hour period. It helps assess hormone levels related to reproductive function.

Quick summary

["This test evaluates long-term FSH levels in urine, useful for diagnosing reproductive health conditions."]

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

Key facts at a glance

LOINC
34306-1
Short code
FSH 24h Ur IRP2-aCnc
Synonyms
FSH 24h Ur IRP2-aCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
3.5
Ref high
12.5
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nd-irp
CPT
83001
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order a 24-hour urine FSH test if you have symptoms or signs of hormonal imbalances, such as irregular periods, infertility, or signs of early menopause. It can also be used to monitor conditions affecting hormone production or function, like certain cancers or genetic disorders.

What to Expect Before the Test

You’ll need to collect all urine produced in a 24-hour period, starting after midnight on one day and ending just before midnight the next. Use clean containers to store the urine, keeping the sample refrigerated if possible. Follow your provider’s instructions carefully to ensure accurate results.

How the Test Is Done

You’ll provide a 24-hour urine sample by collecting all urine in designated containers. The sample is then sent to a lab for analysis to measure the total FSH concentration in your urine over the period.

What the Results Mean

Results from this test help determine if your FSH levels are within expected ranges for your age and reproductive status. Abnormal results may indicate conditions affecting hormone production, such as ovarian reserve issues, pituitary disorders, or other reproductive health concerns.

Reference range

Follicular: 3.5-12.5 mIU/mLN/A

Specimen: urine

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

24-Hour Urine FSH

Frequently asked questions

What does a high FSH level in urine mean?
High levels of FSH in urine may suggest reduced ovarian function, such as early menopause or low ovarian reserve. This can affect fertility and may require further evaluation by a healthcare provider.
What does a low FSH level in urine mean?
Low FSH levels in urine might indicate conditions like pituitary tumors, hypogonadism, or other hormonal imbalances that affect reproductive hormone production. Your provider will discuss next steps based on your clinical picture.
How often should this test be repeated?
This test may be repeated if initial results are abnormal or if your symptoms or medical condition changes. Your healthcare provider will determine the best timing and frequency based on your individual needs.
  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