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      Longitudinal studies of inhibin B levels in boys and young adults with Klinefelter syndrome.

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          Abstract

          The aim of the study was to investigate the longitudinal changes of inhibin B in a group of patients with Klinefelter syndrome (KS; karyotype 47,XXY) progressing through puberty and to compare them to a group of age- and puberty-matched controls. Seven boys with nonmosaic KS (karyotype 47,XXY) and 11 controls were followed with longitudinal serum inhibin B measurements every 3-12 months as they approached and entered puberty. None of the boys had significant bone age delay, and all entered puberty at the normal time and progressed through it at the expected time. In addition, 15 young adults with KS, aged 16.7-29.5 yr, were studied. We found normal levels of inhibin B in prepubertal boys with KS and controls. In patients with KS as well as controls, inhibin B increased progressively before clinical pubertal onset. However, during late puberty inhibin B levels decreased gradually to the low/unmeasurable levels observed later in adult KS, while remaining unchanged in the controls.

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          Author and article information

          Journal
          J Clin Endocrinol Metab
          The Journal of clinical endocrinology and metabolism
          The Endocrine Society
          0021-972X
          0021-972X
          Feb 2003
          : 88
          : 2
          Affiliations
          [1 ] Department of Growth and Reproduction, Rigshospitalet, DK-2100 Copenhagen, Denmark.
          Article
          10.1210/jc.2002-021379
          12574229
          c85246fe-e924-4815-b4f1-453917625263
          History

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