Heavy menstrual flow does not usually result in a significant reduction in platelets. However, excessive menstrual flow over a short period of time and blood loss followed by hemodilution can lead to a dilutional decrease in a variety of blood cells, but this is usually not significant because platelets are likely to replenish compensatorily. Patients with heavy menstrual flow who are examined for thrombocytopenia may also have disease problems related to the platelets themselves, including hematologic disorders. Changes in platelet count or function can affect coagulation, and in some cases can lead to heavy periods. So patients with heavy periods who also have thrombocytopenia need to have their clotting function checked aggressively. Women with poor coagulation function must do the correction as early as possible. Other causes of heavy menstrual flow should also be looked for, including the presence of uterine fibroids, the effect of intrauterine devices, or endocrine disorders, uterine inflammation, and so on. Lowered platelets have little to do with heavy menstrual flow. For lowered platelets, it is recommended to consult a hematologist for further examination to determine the cause of the problem and treatment.