“…It is the secretion of the major accessory glands, prostate, and seminal vesicles. In addition to participation of seminal vesicles in the production of the vaginal plug, seminal vesicle secretions influence the metabolism, motility [11], and surface properties of sperm, and suppress immunocompetence. Although many studies on seminal plasma have been done, including some related to its role in immunology [13,15] and its biophysical properties [18], further research should be carried out to clarify its involvement in sperm motility.…”