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Hormones

Inhibin B

Inhibin B is produced by developing ovarian follicles and may reflect your ovarian reserve and reproductive potential. This marker is particularly valuable for women exploring fertility or monitoring hormonal health.

Doctor's Assessment Included

Reference Ranges

Female
pg/ml
Low 0 Normal 341 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 women, Inhibin B may provide insight into ovarian reserve and follicular health. This is particularly important when planning for pregnancy, evaluating cycle irregularities, or understanding perimenopause transitions.

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

Female

If Low

Low inhibin B may indicate diminished ovarian reserve. Consider fertility consultation.

If High

High inhibin B may indicate good follicular development or a granulosa cell tumour.

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.

Fertility & Pregnancy

IVF Blood Test Complete (Women)

Everything in the IVF panel plus full thyroid, preconception nutrients, progesterone and CMV immunity.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Free T4 (Thyroxine) Folate (Folic Acid) Vitamin B12 Ferritin Progesterone Vitamin D (25-OH) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh TPO Antibodies CMV IgG Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€495,-
Fertility & Pregnancy

IVF Blood Test (Women)

Complete female IVF intake panel: ovarian reserve, thyroid, infectious screening, immunity serology, blood group and CBC.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€425,-

Inhibin B

€130,-