Skip to contentSkip to navigation

Inhibin B

This test is used to evaluate female fertility (and more rarely, male fertility) or for the diagnosis and monitoring of certain types of ovarian tumours. Inhibin B and Inhibin A are two protein hormones produced by ovary cells in females and testicular cells in males. They suppress the secretion of follicle-stimulating hormone (FSH), a hormone involved in the menstrual cycle and sperm production.

Inhibin B levels on the third day of the menstrual cycle provide an indication of the ovarian reserve (potential number of egg cells that can be fertilized), a very useful piece of information for fertility clinics. Inhibin B levels can also be very high in certain sub-types of ovarian tumours (granulosa cell tumours, mucinous tumours). This test complements the information provided by the CA 125 test, another marker of ovarian tumours. Fluctuations in Inhibin B levels during the menstrual cycle can complicate the interpretation of results in premenopausal women.

Term of the Week

Breast cancer

Breast cancer: This is a malignant tumour made up of many cancerous cells. It should be noted that breast cancer is not the most common cause of breast pain, as patients of this disease are often asymptomatic.