How much is the linear exercise activity rate normal

The sperm

motility is generally divided into four grades, including Grade A, Grade B, Grade C and Grade D. Grade A refers to good sperm motility and presents a lively and rapid linear forward movement. Grade B refers to sperm can also move forward in a straight line, but the reaction is relatively slow. Grade C refers to sperm motility or in-situ circle. Grade D refers to sperm not moving. Under normal circumstances, Grade A and Grade B sperm should account for more than 32% of the total number of sperm.

If the sperm motility of male linear movement is relatively low, it will affect the combination of sperm and egg cells, resulting in infertility.