The term “great aunt” refers to menstruation. Delayed menstruation for more than seven days after vaccination may be abnormal, and you need to check the causes of delayed menstruation pregnancy, such as endocrine disorders. Vaccines mainly produce antibodies, which can increase the body’s immunity to certain infectious diseases and prevent the transmission of certain diseases. Common side effects of the vaccine include local redness and swelling at the injection site, fever, dizziness, fatigue, joint soreness and weakness, etc. There are no side effects that lead to irregular menstruation. There are many causes of irregular menstruation, such as emotional abnormalities, living habits, diet, sleep, physical health conditions and other factors affecting the body can lead to abnormal hormone level secretion in the body, having sex after pregnancy can also lead to menstruation does not come. Vaccination menstruation is wrong more than seven days, need to go to the hospital in time, by the doctor according to the specific circumstances, to develop individualized diagnosis and treatment plan, so as not to delay the condition.