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Inhibin B

Published: July 27, 2026Updated: August 25, 2026

Inhibin B is a hormone produced by the gonads that plays a crucial role in the regulation of follicle-stimulating hormone (FSH) and provides insight into reproductive health.

Quick summary

Inhibin B is a hormone that reflects the status of reproductive health and fertility.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
pg/mL
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Roche Inhibin B, Beckman Coulter Inhibin B, Diagnostic Systems Inhibin B
interpretation: {"text":"May indicate reduced fertility, ovarian insufficiency, or testicular dysfunction.","label":"Low levels"}; {"text":"May suggest ovarian hyperstimulation, granulosa cell tumors, or certain reproductive conditions.","label":"High levels"}

Inhibin B is a glycoprotein hormone produced by the granulosa cells of the ovarian follicles in females and the Sertoli cells of the testes in males. It is an important regulator of follicle-stimulating hormone (FSH) secretion from the anterior pituitary gland.

The measurement of inhibin B levels in the blood can provide valuable information about the function of the gonads. In women, it is often used to assess ovarian reserve, while in men, it can indicate the status of spermatogenesis.

Abnormal levels of inhibin B may indicate conditions such as reduced fertility, polycystic ovary syndrome (PCOS), or ovarian tumors in women, and testicular dysfunction or infertility in men.

Frequently asked questions

What is a normal range for inhibin B levels?
The normal range for inhibin B is typically between 15–350 pg/mL, but this can vary depending on age, sex, and other factors.
How is the inhibin B test performed?
The inhibin B test is a blood test that measures the concentration of the hormone in the bloodstream.
  1. 1
    Inhibin B as a Marker of SpermatogenesisSource
  2. 2
    Role of Inhibin B in Reproductive FunctionSource

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

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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 25, 2026. · Read our editorial policy