Total inhibin; inhibin A and inhibin B (two forms) --- NOTE: Inhibin A testing is not able to be performed in Australia at present as no reagents are available. Anti-Mullerian hormone (AMH) should be used instead as a tumour marker for granulosa cell tumours.
Inhibin tests may measure the level of all inhibin in the blood (total inhibin) or one of two different forms of inhibin - inhibin A or inhibin B. Your doctor will request the test that will be most useful for you.
If you are having regular inhibin levels to monitor your condition it is better if you have the same form of inhibin tested and if the test is performed in the same way every time. To be sure, your doctor may recommend that your blood sample is sent to the same laboratory every time.
In younger women, the inhibin level varies throughout the menstrual cycle. To understand what the test means, your doctor may need to know what stage of your cycle you are in at the time of the blood test.
Anti-Mullerian hormone, FSH (follicle-stimulating hormone), CA-125, Alpha-fetoprotein, Human chorionic gonadotropin, Oestrogen, Maternal screening
Last Review Date: April 10, 2020