PCLAF and Infertility: The positive effects of PAF on the motility of freshly isolated and frozen sperms have also been previously reported.24 It has been demonstrated that 10 nM of PAF for 4 hours increases threefold the sperm motility of normal sperms.25 Furthermore, it has been shown that PAF, PAF receptor, and related mRNA have lower expression rates in infertile sperm samples in comparison to normal sperms.19 This may address the different findings between normal and abnormal sperms.