Platelets are a kind of blood cells responsible for hemostasis in human body. Platelets themselves have a series of physiological functions such as adhesion, aggregation, contraction and release, etc. Only when these physiological functions are normal, platelets can play the function of hemostasis normally. Platelet aggregation refers to the ability of platelets to connect with each other through the glycoproteins on the cell membrane, through platelet aggregation can form platelet clots, so as to better play the function of hemostasis. If the platelets themselves are diseased, or if there is a change in certain components of the blood, resulting in a decrease in the ability of platelets to aggregate with each other, then the platelet aggregation rate decreases, and the hemostatic function of the body is significantly reduced. The most common type of disease is called thrombocytopenia, in which the platelet aggregation rate decreases significantly for various reasons, causing the body to experience significant bleeding. For women, this may result in heavy menstrual bleeding, which is more harmful to the body. In addition, in certain cases of poisoning, the platelet aggregation rate may also be reduced due to impaired platelet function.