The term “great aunt” refers to menstruation. Vaccination with the new coronavirus vaccine does not usually cause delayed menstruation. The new coronavirus vaccine is clinically known as the new coronavirus vaccine. After vaccination, adverse reactions such as localized redness, swelling and pain may occur, which are generally normal reactions and do not require treatment, and the symptoms can be relieved on their own within 1 to 2 days. If menstruation is delayed, it should be considered to be related to the influence of pregnancy, endocrine disorders and other factors. For women who have delayed menstruation after vaccination and are sexually active, it is necessary to be alert to the occurrence of pregnancy, and should complete the relevant examinations in a timely manner to ascertain whether or not they are pregnant. In addition, delayed menstruation after vaccination should also be considered endocrine disorders, especially in the case of excessive stress after vaccination, it is more likely to lead to endocrine disorders, which will lead to delayed menstruation. There are many reasons for delayed menstruation. If menstruation still fails to occur even after adjusting the poor lifestyle and improving the bad mood, it is necessary to consult a doctor promptly to avoid delaying the condition.