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  • Title: Serum inhibin B and follicle-stimulating hormone levels as markers in the evaluation of azoospermic men: a comparison.
    Author: Halder A, Fauzdar A, Kumar A.
    Journal: Andrologia; 2005 Oct; 37(5):173-9. PubMed ID: 16266395.
    Abstract:
    Inhibin B is a glycoprotein hormone produced mainly by Sertoli cells of the testes in the adult male. It selectively suppresses the secretion of pituitary follicle-stimulating hormone (FSH) and has local paracrine actions in the testes. Its measurement is useful for investigating the role of inhibin B in male gonadal dysfunction. The objective of this study was to investigate the efficacy of serum inhibin B in men with nonobstructive azoospermia in comparison with FSH. Serum concentration of FSH was measured using microparticle enzyme immunoassay, inhibin B by specific solid phase sandwich enzyme-linked immunosorbent assay in men with nonobstructive azoospermia (n = 46) and control fertile men (n = 5). Mean inhibin B and FSH level was 104.6 pg ml(-1) and 4.0 mIU ml(-1) in control men whereas the value for nonobstructive azoospermic men was 17.06 pg ml(-1) and 31.1 mIU ml(-1) respectively. Inhibin B and FSH levels were significantly different in azoospermia than controls (P < 0.0001). There were six cases of nonobstructive azoospermia with normal inhibin B. Testicular histology did not find any evidence of spermatogenesis in three cases with normal inhibin B. This demonstrated that inhibin B was not a superior predictor for testicular function in our study.
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