Adjustment of spermatozoa : some hereditary modifications influence the tail, or flagellum, of spermatozoa, changing their versatility. Sometimes, this can cause complete asthenozoospermia.
Strange original parcels : Any progressions in the testicles, epididymis, vas deferens or ejaculators can influence versatility.
Varicocele: alludes to the presence of varicose veins in the veins that supply the gonads.
Harmful Substances : Tobacco, liquor or medications can influence, as can openness to manures or pesticides.