Not many people have delayed menstruation with the New Coronavirus vaccine. Usually after the injection of the new coronavirus vaccine, local symptoms such as redness, swelling and pain will appear, and the body will also be feverish. If the symptoms cause stress, it may affect the endocrine system and delay menstruation. This situation usually does not require treatment and will soon return to normal. The symptoms of discomfort after vaccination with the New Coronavirus Vaccine vary depending on the individual’s physical condition. The vaccine is a heterogeneous protein, so after entering the human body, some patients may experience menstrual abnormalities, resulting in an increase or decrease in the amount of menstrual flow or a delay in menstruation. However, if the next menstrual period is still delayed, it means that it is not an adverse reaction to the new coronavirus vaccine, but may be caused by factors such as excessive mental stress, staying up too late, and poor mood. However, diseases such as hyperthyroidism, polycystic ovary syndrome and uterine fibroids cannot be ruled out. Delayed menstruation, it is recommended to go to the hospital for relevant examinations to clarify the causes of delayed menstruation.