Dear friend, the sluggish sperm can be caused by lots of reasons, such as infection, Liquefaction problem, ASAB, Endocrine factors, chromosome abnormality, varicocele and other bad habits like drinking smoking or lack of nutrition and so on.
But among all those factors, infection is the major problem. Infection on prostate, epididymis, Seminal vesicle and seminiferous duct can bring this problem to men. The infection can affect the movement of sperm by damage the morphology. Therefore, if you want to cure this problem you need to take some test to figure out the causes.
If you want to know more information about how other reasons brings this problem to men, please contact me via online chat software from 9am to 5.30 pm Beijing time zone, and Monday to Saturday, emails: wuhandrlee@hotmail.com, herbalistlee@yahoo.com, skype: wuhandrlee@hotmail.com or yahoo messengers: herbalistlee@yahoo.com.