“…More generally, the results of studies on total motility are contrasted. Many studies do not find any trend (Zorn et al, 1999;Seo et al, 2000;Lackner et al, 2005;Sripada et al, 2007;Fisch, 2008;Feki et al, 2009), some observe a decrease (Auger et al, 1995;Zorn et al, 1999;Almagor et al, 2003;Mukhopadhyay et al, 2010) and a few observe an increase (Andolz et al, 1999;Chen et al, 2003) in motility. These results, combined with the ones observed in the present study, suggest that there is no global trend in total sperm motility.…”