Hormones
Follicle Stimulating Hormone (FSH)
CONVERT & COMPARE
mIU/mL
=
8.5
IU/L
Reference ranges by source
Published adult intervals: 8, from 4 named sources, shown in mIU/mL.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
About Follicle Stimulating Hormone (FSH)
This test measures the level of follicle-stimulating hormone (FSH) in a sample of your blood. A hormone is a chemical messenger in your bloodstream that controls the actions of certain cells or organs. FSH plays an important role in sexual development in children and fertility in adults.
FSH levels are controlled by a complex system of hormones made in different parts of your body. Abnormal levels of FSH may be a sign of a problem with any of these parts.
Main source: MedlinePlus ↗
Useful for
Help find the cause of infertility.
Check for medical conditions that affect how the ovaries work.
Find the reason for irregular or stopped menstrual periods in women of childbearing age.
Find out when a woman is most likely to get pregnant.
Find out if menopause or perimenopause may have begun.
Find the reason for a low sperm count.
Check for medical conditions that affect the testicles.
Main source: MedlinePlus ↗
Interpretation
To understand the results of your FSH test, your provider will consider your sex, age, symptoms, medical history, and the results of other hormone tests, especially your level of luteinizing hormone (LH). Your provider can explain what the results of your FSH test mean.
Higher levels of FSH are often a sign of a condition in the reproductive glands (ovaries or testicles) that prevents them from making normal levels of sex hormones. The pituitary responds by making more FSH to try to get them to work properly. High FSH may also be a sign of a condition outside of the reproductive glands that affects how the glands work.
For general wellness information only. Talk to a clinician about your specific results.
Main source: MedlinePlus ↗
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Related biomarkers
More tests in the hormones category.
Sources
Last updated 2026-05-02
This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.