Cancer disease are not detected only at adult but also at young age. One therapy for cancer diseases is chemotherapy and radiation, that give a side effect of infertility in the gonad, therefore, it is necessary to preserve the gonad. Sperm collection from adult is easy but not from the young patients.Keyword: transpalantation, testis, mencit muda, spermatogenesis
                        
                        
                        
                        
                            
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