Follicle Stimulating Hormone (FSH) and Creatinine — Turbidimetric Creatinine Measurement
A combined test for FSH, which reflects pituitary reproductive hormone activity, and creatinine, a marker commonly used to assess kidney filtration or urine concentration.
["FSH helps evaluate reproductive function, while creatinine helps assess kidney filtration or urine concentration."]
Key facts at a glance
- LOINC
- 108386-4
- Short code
- FSH/Creat Msmt Ur
- Synonyms
- FSH/Creat Msmt Ur
- Category
- kidney
- 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
- 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
What is this test?
This test combines follicle-stimulating hormone (FSH) and creatinine measurements. FSH is a pituitary hormone involved in ovarian function and sperm production, while creatinine is a waste product commonly used to evaluate kidney filtration.
Why might I need this test?
FSH may be ordered as part of an evaluation of menstrual or fertility concerns, ovarian function, or menopause. Creatinine may be ordered to assess kidney function or, when measured in urine, to account for urine concentration when interpreting another urinary measurement.
How is the test performed?
FSH is usually measured using an immunoassay on a blood sample. The creatinine component in this test is identified as turbidimetric, in which a laboratory instrument measures light blocked by a reaction mixture. The exact specimen and collection method should be confirmed with the testing laboratory.
How do I prepare for the test?
FSH testing usually uses a blood sample and generally does not require fasting, although timing instructions should be followed. If creatinine is being measured in urine, collect the sample exactly as instructed, including any timed collection or refrigeration requirements.
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.
An elevated FSH level may indicate reduced ovarian function or a different phase of the menstrual cycle, while an unexpectedly low level may suggest reduced pituitary stimulation. An elevated creatinine result can be associated with reduced kidney filtration, although hydration, muscle mass, and the specimen type also affect interpretation. Results should be reviewed with a clinician because FSH and creatinine values may require different reference intervals and clinical context.
Short name
FSH and creatinine
Frequently asked questions
Does a low FSH result mean there is a fertility problem?
Why is creatinine included with FSH?
Do I need to fast for this 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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy