Purpose: The aim of this study was to investigate the protective effect of melatonin on sperm parameters, epididymis and seminal vesicle morphology in adult mouse under chemotherapy. Materials and Methods: Male adult NMRI mice were divided into four groups. The control group received a single dose of DMSO, Group 2 received a single dose of busulfan 20mg/kg. Group 3 was administered melatonin 10...