📌 What is the Inhibin B Test?
A blood test that measures levels of Inhibin B, a hormone produced by the ovaries in females and testes in males.
Inhibin B plays a key role in regulating follicle-stimulating hormone (FSH) and reproductive function.
Used to evaluate fertility, ovarian reserve, and testicular function.
🎯 Purpose of the Test
✅ Assesses ovarian reserve (egg supply) in women, often for fertility evaluation.
✅ Helps diagnose primary ovarian insufficiency (POI) or early menopause.
✅ Evaluates male fertility by assessing sperm production and testicular function.
✅ Aids in detecting granulosa cell tumors (ovarian cancer) and Sertoli cell tumors (testicular cancer).
✅ Monitors response to fertility treatments or chemotherapy.
📊 Normal Ranges (May vary by age, sex, and laboratory)
🔹 Women (Reproductive Age): 45 - 200 pg/mL (higher levels indicate better ovarian reserve)
🔹 Women (Postmenopausal): <10 pg/mL (low levels due to reduced ovarian function)
🔹 Men: 60 - 300 pg/mL (higher levels suggest active sperm production)
🔹 Low Inhibin B Levels: May indicate diminished ovarian reserve, early menopause, or impaired sperm production.
🔹 High Inhibin B Levels: May suggest granulosa cell tumors (ovarian cancer) or Sertoli cell tumors (testicular cancer).
📝 Test Procedure
1️⃣ A blood sample is drawn from a vein.
2️⃣ The sample is analyzed using immunoassay techniques to measure Inhibin B levels.
3️⃣ Results are interpreted alongside FSH and other fertility tests.
⚠️ Who Should Get Tested?
🔹 Women undergoing fertility assessment or IVF treatment.
🔹 Women with irregular periods, suspected ovarian failure, or early menopause.
🔹 Men with suspected infertility or low sperm production.
🔹 Individuals being monitored for ovarian or testicular tumors.
✅ Why is This Test Important?
✔️ Helps assess fertility potential and reproductive health.
✔️ Guides treatment decisions for infertility and hormonal imbalances.
✔️ Aids in early detection of ovarian and testicular cancers.