Indicator Explainer
Inhibin A
Gonadal glycoprotein hormone, Inhibin A, consists of an alpha subunit covalently linked to a beta-A subunit and strongly inhibits pituitary FSH secretion. Serum concentrations transit during the menstrual cycle. Dimers of the beta subunit (a TGF-beta superfamily member), termed activin, are potent stimulators of FSH secretion. (from OMIM 147380 and NCI)
This page explains what the indicator is and how results are interpreted in general terms. Reference ranges depend on the laboratory, the method, and your own situation — no single “normal value” applies to everyone. This page is health information, not a diagnosis. For symptoms, treatment, or urgent concerns, contact a healthcare professional.
When it is tested
Source: National Cancer Institute, NCI Thesaurus 26.09d, C2277. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-19. No individual clinical interpretation or human reviewer is asserted.
Reading results
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also Known As
References
- NCI Thesaurus 26.09d — Inhibin A (C2277)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C2277. NCI definition, reproduced without modification under CC BY 4.0.
- Inhibin βB Mediates Oligotrophic Adaptation via Regulating Muscle Satellite Cell Proliferation and Differentiation in Schizopygopsis younghusbandi. — Integr Zool, 2026-09-25 (PMID 42786917; literature)
- A challenging hypothesis: can a SNP changing cysteine 1 in the α inhibin pro-domain induce reproduction-linked PCOS phenotypes? — Front Endocrinol (Lausanne), 2026-09-23 (PMID 42846887; literature)
- Inhibin B as a biomarker for ovarian reserve and ovarian response: systematic reviews and meta-analyses of diagnostic test accuracy. — Gynecol Endocrinol, 2026-10-10 (PMID 42858260; literature)
- Diagnostic insights into Trisomy 21: a case of abnormal Inhibin A, beta-hCG, AFP, and ultrasound findings. — Arch Physiol Biochem, 2026-09-18 (PMID 42755289; literature)
- Inhibin-Mediated Regulation of Folliculogenesis and Litter Size in Small Ruminants and Non-Ruminants. — Biology (Basel), 2026-10-13 (PMID 42939432; literature)
- Early-Life Exposure to DBP and DEHP Induces Ultrastructural Testicular Damage and Semen Quality Deterioration Through Modulation of Inhibin-α, Calretinin, and PPAR-γ Expression. — Microsc Microanal, 2026-10-01 (PMID 42912191; literature)