Abstract
The aim of the present study is to assess sperm cells quality before and after chilling and freezing processes in modified TRIS extender supplemented with two different antioxidants (vitamin E and/ or N-acetyl-cysteine). Twenty experimental units (EU) will be used. Each EU will correspond to a spermatic "pool" recovered from the epididimus of three healthy male dogs aged between 1 to 5 ye…