Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/jpi.12172 This article is protected by copyright. All rights reserved. Received Date : 10-May-2014 Revised Date : 28-Aug-2014 Accepted Date : 29-Aug-2014 Article type : Original Manuscript Exogenous melatonin supplementation prevents oxidative stress-evoked DNA damage in human spermatozoa. Bejarano I 1* , Monllor F 2* , Marchena AM 1* , Ortiz A 2 , Lozano G 2 , Jiménez MI 2 , Gaspar P 2 , García JF 2 , Pariente JA 1 , Rodríguez AB 1 , Espino J 1 . 1 Department of Physiology (Neuroimmunophysiology and Chrononutrition Research Group), Faculty of Science, University of Extremadura, 06006-Badajoz, Spain. 2 Extremadura Center of Human Assisted Reproduction, Infantile Hospital, Badajoz, Spain. *Equally contribution. Running title: Human sperm quality and apoptosis To whom correspondence should be addressed: Dr. Ignacio Bejarano Department of Physiology, Faculty of Science University of Extremadura