The vaccine has no effect on a woman’s menstrual cycle. The new crown vaccine currently used in clinical practice mainly includes adenovirus vector vaccine, recombinant subunit vaccine and inactivated vaccine. Different types of vaccines are able to make the human body produce protective antibodies to ward off the attack of the virus. All types of vaccines have been extensively tested and have not been found to affect women’s menstrual cycle. They do not cause disruption of the menstrual cycle, nor do they cause an increase or decrease in the amount of menstrual flow, nor do they cause symptoms such as menstrual cramps, so it is possible to receive the vaccine even if you are menstruating. The vaccine is important for preventing infection and controlling epidemics, so it is important to get vaccinated as soon as possible.