You can’t get pregnant until 3 to 6 months after the vaccine is given. The nine-valent vaccine is a vaccine that prevents cervical cancer, and this vaccine requires a total of three injections. Women who are planning to get pregnant should have an interval before they can get pregnant. The vaccine also belongs to a kind of medicine, which may have certain effects on the development of the fetus, so you need to wait until the whole vaccine is finished and metabolized before you prepare for pregnancy. In the preparation stage, you can take folic acid to prevent the fetus from having cardiovascular malformation and other effects. At the same time, pay attention to stay away from radiation, avoid contact with toxic and harmful substances. During the preparation period, you can go to the hospital for a preconception examination to make sure that there is no abnormality in the reproductive system of both parties before preparing for pregnancy.