Sperm motility grade d mainly refers to inactive sperm and does not reflect its own condition, you need to go to the hospital for further examination and treatment for the results. Sperm motility is mainly used to reflect the sperm’s ability to move, and can generally be categorized into four classes: class A, class B, class C, and class D. Class A usually refers to sperm that can move forward quickly and with vigor. Grade a usually refers to sperm that can move forward quickly with high vigor, while grade b is sperm that move forward slowly or slowly, while c is sperm that move non-forward and grade d is sperm that stop moving. So sperm motility grade d just refers to this category of inactive sperm alone and does not express the condition of the patient’s own test results. Usually the sperm activity rate is the sum of the percentage of sperms of class A + class B + class C. Sperm viability is mainly observed as the percentage of sperms of class A and class A + class B. Weak spermatozoonosis can be diagnosed when the sperms of class A are less than 25%, or when the sperms of class A + class B are less than 50%. In this case, the conception rate will be reduced, and the reason needs to be found out, and the cause of the problem needs to be treated in order to increase the activity of the sperms. If the a-grade is more than 25% and the a-grade + b-grade is more than 50%, then it is normal and does not require any treatment. So what you need to do now is to find out more about your sperm motility and treat it according to the results.