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ORIGINAL ARTICLE
Year : 2015  |  Volume : 128  |  Issue : 18  |  Page : 2439-2443

Role of Gonadotropin-releasing Hormone Stimulation Test in Diagnosing Gonadotropin Deficiency in Both Males and Females with Delayed Puberty


1 Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853; Department of Internal Medicine, Fushun Hospital of Traditional Chinese Medicine, Fushun, Liaoning 113008, China
2 Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853; School of Medicine, Nankai University, Tianjin 300071, China
3 Department of Endocrinology, Shanxi Dayi Hospital, Taiyuan, Shanxi 030032, China
4 Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China

Correspondence Address:
Prof. Yi-Ming Mu
Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0366-6999.164926

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Background: Delayed puberty can result either from constitutional delay of growth and puberty (CDP) or idiopathic hypogonadotropic hypogonadism (IHH). Gonadotropin-releasing hormone (GnRH) stimulation test has been generally accepted as a current method for diagnosing delayed puberty. The objective of this research was to assess the cut-off values and the efficacy of GnRH stimulation test in the diagnosis of delayed puberty in both males and females. Methods: A study of 91 IHH, 27 CDP patients, 6 prepubertal children, and 20 pubertal adults was undertaken. Blood samples were obtained at 0, 30, 60, and 120 min after GnRH administration and the levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were measured. For each parameter, the sensitivities and specificities were estimated, and the receiver operating characteristic (ROC) curves were constructed. Results: The ROC curves indicated that a serum basal LH <0.6 IU/L or peak LH <9.74 IU/L resulted in moderate sensitivity (73.8% or 80.0%) and specificity (90.9% or 86.4%) in the diagnosis of HH in males. Serum basal LH <0.85 IU/L or basal FSH <2.43 IU/L resulted in moderate sensitivity (80.0% or 100.0%) and specificity (75.0% or 50.0%) in the diagnosis of HH in females. Conclusions: Our data suggest that isolated use of the gonadorelin stimulation test is almost sufficient to discriminate between HH and CDP in males, but unnecessary in females. The most useful predictor is serum basal or peak LH to differentiate these two disorders in males, but serum basal LH or FSH in females.


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