There is not enough clinical data to prove that the Neocoron vaccine causes menstrual disorders as a side effect in women. The New Crown vaccine is a vaccine that targets the immune system and is used to prevent the new coronavirus and is not a hormonal agent. Therefore, in general, it does not cause too much impact on the endocrine system of the human body and does not cause much impact on the menstrual flow. Some women may have menstrual disorders due to abnormal emotions, improper diet, cold stimulation, staying up late, alcoholism, etc. Some women may have menstrual disorders due to endocrine disorders, endometrial thickening and other diseases. If a woman happens to receive the New Crown vaccine at this time, she may be mistaken to think that the New Crown vaccine caused the menstrual disorder. Therefore, it is recommended that patients with symptoms of menstrual disorders should visit a regular hospital in a timely manner to clarify the cause and provide symptomatic treatment. There are some individual differences in each person’s reaction to the New Crown vaccine, and there is not enough research data on the possible side effects of the New Crown vaccine. If a woman develops more severe menstrual disorders after receiving the New Crown vaccine, prompt medical treatment is recommended. In addition, although there are no excessive requirements for whether or not the vaccine can be administered during menstruation, it is recommended that women try to have the vaccine administered after their menstrual period, as some women may experience a certain degree of immune deficiency during menstruation to avoid other side effects caused by the vaccine at this time.