Inhibin Serum (or Plasma) Concentration

What Is Inhibin Used For?

Inhibin is primarily measured in blood serum or plasma to evaluate ovarian function in women and testicular function in men. It can help diagnose conditions like polycystic ovary syndrome (PCOS), ovarian reserve issues, or fertility problems. In women, inhibin levels may also be checked during fertility treatments to monitor progress.

Who Might Need This Test?

A healthcare provider may recommend this test if you have symptoms of hormonal imbalances, such as irregular menstrual cycles (in women), unexplained infertility, or if you’re undergoing fertility treatments. Men might have this test if they have concerns about low testosterone or reproductive health.

How Is the Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum or plasma, which is sent to a lab for analysis. The test measures the concentration of inhibin using an immunoassay method to detect and quantify the hormone.

What Are Possible Results?

Results are expressed in arbitrary units per milliliter (U/mL) or mass concentration units, depending on the lab’s reporting method. Interpretation depends on your age, sex, and clinical context. Abnormal levels may signal underlying health concerns that require further evaluation.