This Article Full Text Full Text (PDF) Submit a related Letter to the Editor Purchase Article View Shopping Cart Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Copyright Permission Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Sehested, A. Articles by Skakkebaek, N. E. Search for Related Content PubMed PubMed Citation Articles by Sehested, A. Articles by Skakkebaek, N. E.

Serum Inhibin A and Inhibin B in Healthy Prepubertal, Pubertal, and Adolescent Girls and Adult Women: Relation to Age, Stage of Puberty, Menstrual Cycle, Follicle-Stimulating Hormone, Luteinizing Hormone, and Estradiol Levels*

Department of Growth and Reproduction, Rigshospitalet (A.S., A.J., A.M.A., T.K.J., J.M., N.E.S.), and Department of Biostatistics, Panum Institute (J.H.P.), University of Copenhagen, 2100 Copenhagen, Denmark; and Department of Epidemiology and Public Health (T.K.J.), Imperial College of Medicine at St. Mary’s, London, United Kingdom W21PG

Address all correspondence and requests for reprints to: Dr. Astrid Sehested, Department of Growth and Reproduction GR 5064, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen Ø, Denmark. E-mail: sehested{at}rh.dk

Biochemical assessment of gonadal function during maturation in girls and in adult women can be troublesome. With the recent advent of specific assays for the gonadal peptides inhibin A and inhibin B, it might be possible to achieve a clearer picture of events. We therefore determined serum levels of inhibin A, inhibin B, FSH, LH and estradiol in a cross-sectional study of 403 healthy schoolgirls (aged 6–20 yr) in relation to age and stage of puberty and in 181 healthy nonpregnant women (aged 20–32 yr) in relation to stage of the menstrual cycle. In addition, inhibin A and inhibin B were measured daily throughout the menstrual cycle in 10 healthy adult women. Levels of inhibin B are low or undetectable in prepubertal girls (median, 26.5 pg/mL; 95% prediction interval, <20–100 pg/mL), increase sharply through pubertal stage II to peak in stage III (median, 84 pg/mL; 95% prediction interval, 28–227 pg/mL) and thereafter decline through pubertal stages IV and V. These changes presumably reflect increasing ovarian stimulation through early puberty, resulting in an increased number of developing follicles, follicles reaching a later stage of development before undergoing atresia, or both. Declining levels in late puberty and adulthood probably reflect the onset of the menstrual cycle and the subsequent appearance of the luteal phase, where inhibin B levels are low. Inhibin A levels are undetectable or very low in early puberty (median, <7 pg/mL; 95% prediction interval, <7–14) pg/mL), increasing gradually through pubertal stages to reach their highest values in adult women (median, 21.5 pg/mL; 95% prediction interval, <7–129 pg/mL). Levels of inhibin A greater than 19 pg/mL are only seen in postmenarcheal girls in puberty and in adult women, again consistent with inhibin A being primarily produced by the corpus luteum. Determining cut-off levels of serum inhibin B regarding whether a girl had entered puberty resulted in similar (low) sensitivities and specificities as those found for cut-off levels of LH or estradiol due to the large overlap between serum values in Tanner stages I and II. Correlations between inhibin A and inhibin B and FSH, LH, and estradiol within pubertal stages are presented. In early puberty both inhibin A and inhibin B correlated positively with LH and FSH. In late puberty inhibin A correlated negatively with FSH and did not correlate with LH; inhibin B still correlated positively with both FSH and LH, now most strongly with FSH. In adult women during the menstrual cycle, serum inhibin B levels increased during the follicular phase, indicating the greatest production by follicles in early stages of development. In contrast, serum inhibin A levels peaked during the luteal phase, indicating the greatest production by the corpus luteum.

In conclusion, serum inhibin A and inhibin B levels in normal puberty in girls show consistency with our knowledge of the manner in which these hormones are secreted within the menstrual cycle in adult women. The presented reference values may be of use in the clinical evaluation of pubertal development in girls.

This article has been cited by other articles:

				K. Sorensen, A. M. Andersson, N. E. Skakkebaek, and A. Juul Serum Sex Hormone-Binding Globulin Levels in Healthy Children and Girls with Precocious Puberty before and during Gonadotropin-Releasing Hormone Agonist Treatment J. Clin. Endocrinol. Metab., August 1, 2007; 92(8): 3189 - 3196. [Abstract] [Full Text] [PDF]

				V. Sundblad, V. A. Chiauzzi, L. Andreone, S. Campo, E. H. Charreau, and L. Dain Controversial role of inhibin {alpha}-subunit gene in the aetiology of premature ovarian failure Hum. Reprod., May 1, 2006; 21(5): 1154 - 1160. [Abstract] [Full Text] [PDF]

				F. P Hohmann, J. S E Laven, F. H de Jong, and B. C J M Fauser Relationship between inhibin A and B, estradiol and follicle growth dynamics during ovarian stimulation in normo-ovulatory women Eur. J. Endocrinol., March 1, 2005; 152(3): 395 - 401. [Abstract] [Full Text] [PDF]

				D. D. Elsholz, V. Padmanabhan, R. L. Rosenfield, P. R. Olton, D. J. Phillips, and C. M. Foster GnRH agonist stimulation of the pituitary-gonadal axis in children: age and sex differences in circulating inhibin-B and activin-A Hum. Reprod., December 1, 2004; 19(12): 2748 - 2758. [Abstract] [Full Text] [PDF]

				C. M. Foster, P. R. Olton, M. S. Racine, D. J. Phillips, and V. Padmanabhan Sex differences in FSH-regulatory peptides in pubertal age boys and girls and effects of sex steroid treatment Hum. Reprod., July 1, 2004; 19(7): 1668 - 1676. [Abstract] [Full Text] [PDF]

				V. Popovic, M. Djurovic, A. Cetkovic, D. Vojvodic, S. Pekic, S. Spremovic, M. Petakov, S. Damjanovic, N. Milic, C. Dieguez, et al. Inhibin B: A Potential Marker of Gonadal Activity in Patients with Anorexia Nervosa during Weight Recovery J. Clin. Endocrinol. Metab., April 1, 2004; 89(4): 1838 - 1843. [Abstract] [Full Text] [PDF]

				M. Chellakooty, I. M. Schmidt, A. M. Haavisto, K. A. Boisen, I. N. Damgaard, C. Mau, J. H. Petersen, A. Juul, N. E. Skakkebaek, and K. M. Main Inhibin A, Inhibin B, Follicle-Stimulating Hormone, Luteinizing Hormone, Estradiol, and Sex Hormone-Binding Globulin Levels in 473 Healthy Infant Girls J. Clin. Endocrinol. Metab., August 1, 2003; 88(8): 3515 - 3520. [Abstract] [Full Text] [PDF]

				C. H. Gravholt, R. W. Naeraa, A.-M. Andersson, J. S. Christiansen, and N. E. Skakkebaek Inhibin A and B in adolescents and young adults with Turner's syndrome and no sign of spontaneous puberty Hum. Reprod., August 1, 2002; 17(8): 2049 - 2053. [Abstract] [Full Text] [PDF]

				M. Creus, J. Ordi, F. Fabregues, R. Casamitjana, J. A. Vanrell, and J. Balasch Mid-luteal serum inhibin-A concentration as a marker of endometrial differentiation Hum. Reprod., July 1, 2001; 16(7): 1347 - 1352. [Abstract] [Full Text] [PDF]

				D. J. Bernard and T. K. Woodruff Inhibin Binding Protein in Rats: Alternative Transcripts and Regulation in the Pituitary across the Estrous Cycle Mol. Endocrinol., April 1, 2001; 15(4): 654 - 667. [Abstract] [Full Text]