Quantifying the intraindividual variation of antimüllerian hormone in the ovarian cycle

Antimullerian hormone (AMH) variation includes biological and analytical components. Clinicians should consider the total variation, about 20%, especially when assessing cycling women with AMH values close to clinical cutoffs.

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Volume 106, Issue 5, Pages 1230-1237

Authors:

Narelle Hadlow, M.B.B.S., Suzanne J. Brown, B.Sc., Afsana Habib, M.B.B.S., Robert Wardrop, B.App.Sc., John Joseph, B.Sc., Melissa Gillett, M.B.B.S., Rhonda Maguire, M.B.B.S., Johan Conradie, M.B., Ch.B.

Abstract:

Objective

To quantify intraindividual variability of antimüllerian hormone (AMH) as analytical and biological coefficients of variation and assess the effects of variation on clinical classification.

Design

Retrospective cohort study.

Setting

Not applicable.

Patient(s)

Thirty-eight women referred by general practitioners.

Intervention(s)

None.

Main Outcome Measure(s)

Total intraindividual variability (CVW), analytical (CVA) and biological variability (CVI) for each woman and for AMH ranges: low (<5 pmol/L), reduced (5–10), moderate (>10–30) and high (>30 pmol/L), with calculation of proportion of women crossing clinical cutoffs and expected variability around each cutoff.

Result(s)

Cycling women (n = 38) contributed 238 blood samples (average 6 samples each). The average total intraindividual AMH variability was 20% (range: 2.1% to 73%). Biological variation was 19% (range: 0 to 71%) and at least twice the analytical variation of 6.9% (range: 4.5% to 16%). Reclassification rates were highest in women with low (33%) or reduced AMH (67%) levels. Expected variations around the 5, 10, and 30 pmol/L cutoffs were 3–7, 7–13, and 20–40 pmol/L, respectively. In a woman with mean AMH in the 10–30 pmol/L range, the span of results that could occur was 7–40 pmol/L.

Conclusion(s)

Total variation in AMH was 20%, and the majority of this was biological. Changes in AMH resulted in reclassification in 29% of women and occurred most frequently in those with low and reduced AMH. In cycling women, the variability in AMH should be considered by clinicians, especially if a result is close to a clinical cutoff.


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Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders. The journal publishes juried original scientific articles in clinical and laboratory research relevant to reproductive endocrinology, urology, andrology, physiology, immunology, genetics, contraception, and menopause. Fertility and Sterility® encourages and supports meaningful basic and clinical research, and facilitates and promotes excellence in professional education, in the field of reproductive medicine.

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