Anatomy & hormones
Inhibin B is produced by growing ovarian follicles and, in men, by the testes, where it reflects active sperm production (Sertoli cell function). In women it was historically used as an ovarian reserve marker but has largely been replaced by AMH and antral follicle count, which are more reliable and less cycle-dependent. In men, a very low inhibin B alongside a high FSH can support a diagnosis of significant testicular sperm-production failure.
Also known as: inhibin B test
Sources
- Indian Council of Medical Research (icmr.gov.in)
- Federation of Obstetric and Gynaecological Societies of India (fogsi.org)
Last reviewed: 9 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.