Sperm d immobility is when sperms stay in place, suggesting more dead sperms. If this occurs for a long time, it may lead to male infertility. Sperm activity can be categorized into four grades, A, B, C, and D. Grade A indicates that sperm can move forward in a straight line, grade B sperm indicates its curved forward movement, grade C sperm indicates that the direction of movement is uncertain, and grade D sperm indicates that the sperm is not moving in place, which is mostly a sign of more dead sperm. If the sperm is not moving in grade D for a long period of time, it is mostly considered to be caused by low sperm vitality, and the patient may show difficulty in getting pregnant without other obvious symptoms. At this time, oral vasodilators, such as pancreatic kallikrein releasing enzyme, can be taken under the guidance of the doctor, which can improve sperm motility or oral cell metabolism improvement drugs, such as adenosine triphosphate, which can also help to enhance sperm motility. Some patients can take high ligation of the internal spermatic vein, which can improve semen therapy. If sperm D immobility occurs, relevant treatment measures need to be taken actively.