Follicle Stimulating Hormone (FSH) - Serum, 24-Hour Urine Collection
This test measures your body’s natural hormones involved in reproductive health. It includes both blood (serum) and urine measurements over 24 hours to assess hormone balance.
["Helps diagnose hormonal imbalances affecting fertility, menstrual cycles, or other reproductive health concerns."]
Key facts at a glance
- LOINC
- 12662-3
- Short code
- FSH 20M p chal SerPl-sCnc
- Synonyms
- FSH 20M p chal SerPl-sCnc
- 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 Is Done
Your doctor may order this test if you experience irregular periods, difficulty getting pregnant, low sperm count, or symptoms like early menopause. It helps evaluate conditions like polycystic ovary syndrome (PCOS), ovarian dysfunction, or hormonal disorders.
How the Test Works
A blood sample is drawn to measure FSH levels in serum. Additionally, a 24-hour urine sample is collected to measure total FSH excretion, providing a broader picture of hormone production and clearance.
Sample Collection Process
For the blood test, you’ll have a small needle inserted into your arm to draw serum. For the urine test, you’ll collect all urine for 24 hours in a special container. Follow your healthcare provider’s instructions carefully to ensure accurate results.
What to Expect Before the Test
No special preparation is needed for the blood draw, but avoid strenuous activity or caffeine before testing. For the urine collection, drink plenty of water and empty your bladder before starting. Wear comfortable clothing for ease.
Reference range
Follicular: 3.5-12.5 mIU/mLN/A
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 Urine Profile
Frequently asked questions
FSH levels can indicate whether your ovaries or testes are functioning properly. High levels may suggest early menopause, ovarian failure, or conditions like PCOS. Low levels might indicate hypothyroidism, pituitary disorders, or other hormonal imbalances.
FAQs
How long will results take? Blood results are usually available within 1–3 days, while urine analysis may take slightly longer depending on lab processing.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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