Anti-Müllerian Hormone (AMH)
AMH (Anti-Müllerian Hormone) is a glycoprotein produced by granulosa cells of preantral and small antral ovarian follicles. Its serum level reflects the size of the pool of small growing follicles.1 AMH is less cycle-dependent than FSH or estradiol, though modern automated assays show measurable intra-cycle and between-cycle variation.2 It estimates how many small follicles are present, not a permanent verdict on reproductive potential. It may shift when correctable contributors are identified and addressed.3
What AMH measures is follicle quantity, not egg quality, follicle quality, or how well ovulation is functioning.4 For natural conception, one competent, well-supported follicle per cycle is what the body works with.5 On its own, a low AMH level reflects current follicle quantity, not necessarily egg quality or how likely conception is in a given cycle, and a systematic review found it has poor predictive value for spontaneous pregnancy.6 A low AMH level is a reason to ask why and begin the workup promptly.
What does a low AMH mean? In the conventional model, a low AMH result triggers urgency because IVF requires recruiting many follicles at once.7 Low AMH describes the current follicle pool; it says nothing about the quality of the egg inside any individual follicle. Quality and quantity are separate measurements, and for natural conception, quality is the variable that matters.
AMH's significance as a "low" number is largely anchored to protocols requiring multiple egg retrieval. That is the IVF context.8 An RRM clinician asks a different question: is this follicle maturing well? The total pool size informs the workup. In a 2018 observational cohort of 403 women who had averaged 2.1 prior IVF attempts, restorative care was associated with a 32.1 percent cumulative (life-table) live birth rate.9 This was a single-arm cohort; it shows that a diminished follicle pool does not, by itself, foreclose a successful pregnancy.10
A low AMH result is a diagnostic signal. The question is why. Age is one factor.11 But autoimmune conditions, prior ovarian surgery, endometriosis, vitamin D deficiency, and thyroid dysfunction can all reduce AMH before age alone explains it.12 Correcting underlying contributors may move the measured value.3 A change in the AMH marker is not the same as a change in the chance of conception, which AMH does not reliably predict.6 A meta-analysis found DHEA supplementation was associated with higher serum AMH in women with diminished ovarian reserve, though the effect was weaker when limited to randomized trials.13
AMH also has a ceiling problem. In PCOS/PMOS, many small follicles accumulate without maturing, which drives AMH markedly higher.14 A high number can reflect arrested follicle development that warrants investigation.15
AMH is one input to a fuller workup. NaProTechnology protocols may incorporate AMH alongside AFC, cycle chart patterns, timed hormonal panels, and a follicle maturation study as part of a fuller ovarian reserve assessment. AMH also has a developmental role: it is produced by Sertoli cells in males during fetal development and drives regression of the Müllerian ducts.1 This dual origin is why AMH appears in male factor evaluation as a marker of Sertoli cell function.16
Cited in this entry
- Dewailly D, Andersen CY, Balen A, Broekmans F, Dilaver N, Fanchin R, et al. The physiology and clinical utility of anti-Müllerian hormone in women. Human Reproduction Update. 2014. https://pubmed.ncbi.nlm.nih.gov/24430863/
- Melado L, Lawrenz B, Sibal J, Abu E, Coughlan C, Navarro AT et al. Anti-müllerian Hormone During Natural Cycle Presents Significant Intra and Intercycle Variations When Measured With Fully Automated Assay. Frontiers in endocrinology. 2018. https://pubmed.ncbi.nlm.nih.gov/30542322/
- Moridi I, Chen A, Tal O, Tal R The Association between Vitamin D and Anti-Müllerian Hormone: A Systematic Review and Meta-Analysis. Nutrients. 2020. https://pubmed.ncbi.nlm.nih.gov/32481491/
- Cedars MI Evaluation of Female Fertility-AMH and Ovarian Reserve Testing. The Journal of clinical endocrinology and metabolism. 2022. https://pubmed.ncbi.nlm.nih.gov/35100616/
- Hodgen GD, Kenigsburg D, Collins RL, Schenken RS Selection of the dominant ovarian follicle and hormonal enhancement of the natural cycle. Annals of the New York Academy of Sciences. 1985. https://pubmed.ncbi.nlm.nih.gov/3925837/
- Lin C, Jing M, Zhu W, Tu X, Chen Q, Wang X, et al. The value of anti-Müllerian hormone in the prediction of spontaneous pregnancy: a systematic review and meta-analysis. Frontiers in Endocrinology. 2021. https://pubmed.ncbi.nlm.nih.gov/34721287/
- Broer SL, Mol BW, Hendriks D, Broekmans FJ The role of antimullerian hormone in prediction of outcome after IVF: comparison with the antral follicle count. Fertility and sterility. 2009. https://pubmed.ncbi.nlm.nih.gov/18321493/
- Steiner AZ, Pritchard D, Stanczyk FZ, Kesner JS, Meadows JW, Herring AH et al. Association Between Biomarkers of Ovarian Reserve and Infertility Among Older Women of Reproductive Age. JAMA. 2017. https://pubmed.ncbi.nlm.nih.gov/29049585/
- Boyle PC, de Groot T, Andralojc KM, Parnell TA. Healthy singleton pregnancies from restorative reproductive medicine (RRM) after failed IVF. Frontiers in Medicine. 2018. https://pubmed.ncbi.nlm.nih.gov/30109231/
- Morin SJ, Patounakis G, Juneau CR, Neal SA, Scott RT, Seli E Diminished ovarian reserve and poor response to stimulation in patients <38 years old: a quantitative but not qualitative reduction in performance. Human reproduction (Oxford, England). 2018. https://pubmed.ncbi.nlm.nih.gov/30010882/
- Seifer DB, Baker VL, Leader B Age-specific serum anti-Müllerian hormone values for 17,120 women presenting to fertility centers within the United States. Fertility and sterility. 2011. https://pubmed.ncbi.nlm.nih.gov/21074758/
- Younis JS, Shapso N, Ben-Sira Y, Nelson SM, Izhaki I. Endometrioma surgery: a systematic review and meta-analysis of the effect on antral follicle count and anti-Müllerian hormone. American Journal of Obstetrics and Gynecology. 2022. https://pubmed.ncbi.nlm.nih.gov/34265271/
- Yin WW, Huang CC, Chen YR, Yu DQ, Jin M, Feng C. The effect of medication on serum anti-müllerian hormone (AMH) levels in women of reproductive age: a meta-analysis. BMC Endocrine Disorders. 2022. https://pubmed.ncbi.nlm.nih.gov/35698127/
- Teede H, Misso M, Tassone EC, Dewailly D, Ng EH, Azziz R, et al. Anti-Müllerian hormone in PCOS: a review informing international guidelines. Trends in Endocrinology and Metabolism. 2019. https://pubmed.ncbi.nlm.nih.gov/31160167/
- Pigny P, Merlen E, Robert Y, Cortet-Rudelli C, Decanter C, Jonard S et al. Elevated serum level of anti-mullerian hormone in patients with polycystic ovary syndrome: relationship to the ovarian follicle excess and to the follicular arrest. The Journal of clinical endocrinology and metabolism. 2003. https://pubmed.ncbi.nlm.nih.gov/14671196/
- Benderradji H, Prasivoravong J, Marcelli F, Leroy C Role of Anti-Müllerian Hormone in Male Reproduction and Sperm Motility. Seminars in reproductive medicine. 2024. https://pubmed.ncbi.nlm.nih.gov/38914117/
Authoritative References
How other clinical authorities define this term. RRM Academy curates these verbatim or under fair use so the medical consensus is visible alongside our RRM-contextualized definition above.
- MeSH D054304
A glycoprotein that causes regression of MULLERIAN DUCTS. It is produced by SERTOLI CELLS of the TESTES. In the absence of this hormone, the Mullerian ducts develop into structures of the female reproductive tract. In males, defects of this hormone result in persistent Mullerian duct, a form of MALE PSEUDOHERMAPHRODITISM.
- NCI Thesaurus C101737
Muellerian-inhibiting factor (560 aa, ~59 kDa) is encoded by the human AMH gene. This protein plays a role in the development of the male reproductive system.
- Wikipedia Anti-M%C3%BCllerian_hormone
Anti-Müllerian hormone (AMH), also known as Müllerian-inhibiting factor (MIF), is a protein that in humans is encoded by the AMH gene.
This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.