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Hormones

Inhibin B

Inhibin B is a key marker of testicular function in men. Produced by Sertoli cells, it reflects the health of sperm production and may provide important insight into male fertility and gonadal health.

Doctor's Assessment Included

Reference Ranges

Male
pg/ml
Low 25 Normal 325 High

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

Check your own value

What It Measures

This test measures the concentration of Inhibin B in your blood. In women, it is produced by developing ovarian follicles and reflects follicular activity. In men, it is produced by Sertoli cells in the testes and is associated with sperm production.

Why It Matters

For men, Inhibin B is directly associated with Sertoli cell function and spermatogenesis. Monitoring this marker can help assess reproductive potential and may support early detection of testicular health concerns.

When to Test

Testing may be recommended when evaluating fertility concerns, assessing ovarian reserve, investigating unexplained infertility, or monitoring testicular function. Your healthcare provider can advise on optimal testing timing.

Symptoms

Low Levels

Some people with low Inhibin B may experience fertility challenges. In women, this could suggest reduced ovarian reserve. In men, low levels may be associated with decreased sperm production or testicular dysfunction.

High Levels

Elevated Inhibin B levels are not typically associated with specific symptoms in healthy individuals. However, markedly high levels may sometimes be associated with certain gonadal tumours and should be evaluated by a healthcare provider.

Recommendations

Male

If Low

Low inhibin B may indicate reduced testicular function. Consider fertility evaluation.

If High

High inhibin B is generally not concerning in men.

Lifestyle Tips

Maintaining a healthy weight, managing stress, and avoiding smoking may support reproductive health and gonadal function. Regular check-ups with a healthcare provider can help monitor fertility markers over time.

Frequently Asked Questions

What does Inhibin B tell us about fertility?
In women, Inhibin B reflects ovarian follicle activity and may indicate ovarian reserve. In men, it is associated with Sertoli cell function and sperm production capacity.
When during the menstrual cycle should Inhibin B be tested?
For women, Inhibin B is typically tested in the early follicular phase of the menstrual cycle. Your healthcare provider will advise on the best timing.
Can Inhibin B levels change over time?
Yes, Inhibin B levels typically decline with age in both men and women. In women, this decline may accelerate as ovarian reserve diminishes approaching menopause.

Tests with related values

These panels measure values from the same category as this marker.

Health Checkups

Men Over 40 Panel

Age-appropriate screening including testosterone and PSA.

HbA1c (Glycated Hemoglobin) PSA (Prostate-Specific Antigen) ALT (Alanine Aminotransferase) TSH (Thyroid Stimulating Hormone) Triglycerides Creatinine Free T4 (Thyroxine) LDL Cholesterol SHBG (Sex Hormone Binding Globulin) Total Cholesterol Vitamin D (25-OH) Free Testosterone Total Testosterone hs-CRP (High Sensitivity CRP) HDL Cholesterol
€279,-
Health Checkups

Complete Men's Health Panel

A broad men's health panel: hormones, heart, metabolic, and organ function in one blood draw.

HbA1c (Glycated Hemoglobin) ALT (Alanine Aminotransferase) TSH (Thyroid Stimulating Hormone) Triglycerides Creatinine Glucose (Fasting) Free T4 (Thyroxine) LDL Cholesterol SHBG (Sex Hormone Binding Globulin) Total Cholesterol Vitamin D (25-OH) Free Testosterone Total Testosterone Ferritin hs-CRP (High Sensitivity CRP) HDL Cholesterol
€289,-

Inhibin B

€130,-