FSH (Follicle Stimulating Hormone) – Serum, 7-day Average
This test measures your body’s natural levels of follicle-stimulating hormone (FSH) over a 7-day period using a blood sample. FSH plays a key role in hormone regulation, particularly in reproductive health.
["FSH helps balance hormone production and supports fertility in both men and women."]
Key facts at a glance
- LOINC
- 50483-7
- Short code
- FSH sp7 SerPl-aCnc
- Synonyms
- FSH sp7 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
What Is FSH and Its Role in the Body?
Follicle-stimulating hormone (FSH) is a critical hormone produced by the pituitary gland. In women, it stimulates the ovaries to develop eggs, while in men, it supports sperm production. This test tracks your body’s natural FSH levels over a week to assess reproductive health and hormone balance.
Why Might You Need This Test?
Your doctor may order this test if you’re experiencing symptoms like irregular periods (in women), low libido, infertility, or signs of hormonal imbalances. It can also help diagnose conditions like polycystic ovary syndrome (PCOS), menopause, or hypogonadism.
Who Should Consider This Test?
Women undergoing fertility treatments, those with suspected hormonal disorders, or individuals with unexplained menstrual irregularities may need this test. Men with fertility concerns or signs of low testosterone may also be evaluated.
What to Expect Before the Test
No special preparation is needed, but you may be asked to fast for 8–12 hours before your blood draw. Wear comfortable clothing and plan to rest after the test. Your doctor will provide specific instructions if you’re taking certain medications.
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 (7-day avg)
Frequently asked questions
How Often Should I Get This Test?
What Are Normal Results?
Can I Take Medications Before the Test?
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