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Purpose: To provide characteristics and hormonal profiles of secondary amenorrhea cases in adolescent patients treated at Hasan Sadikin General Hospital in Bandung.Patients and Methods: The study was retrospective in nature and involved the analysis of medical records from 2017 to 2022 for 44 adolescent patients aged 10– 18 who had secondary amenorrhea.Results: There were 44 adolescents included in this study after excluded 69 adults from 113 secondary amenorrhea cases. The majority of patients were 14– 17 years old (38.63%), in senior high school (45.45%), had started menarche at 11 years old (45.45%), had normal nutritional status (65.91%), and had normal stature (65.91%). The underlying diseases found in most patients were systemic lupus erythematosus (SLE) and tuberculosis. Among the patients, 29 had FSH, LH, and estradiol levels measured. The results of hormonal assays showed a wide range of abnormal serum levels, with normal to low concentrations of FSH and low levels of LH and estradiol. The median (interquartile range) results for FSH, LH, and estradiol were 4.57 (0.64, 90.65), 1.635 (0.06, 55.76), and 24.3 (0.2, 154.71), respectively. Positive significant correlation between FSH and LH (p < 0.01) was found in children with secondary amenorrhea.Conclusion: Hormonal assay for FSH, LH, and Estradiol showed a wide range of abnormal serum level. Normal to low concentration levels of FSH and low LH and estradiol. The majority of secondary amenorrhea patients are associated with autoimmune disease and infection. [ABSTRACT FROM AUTHOR]