After the quadrivalent cervical cancer (HPV) vaccine is given, you can usually start preparing for pregnancy around three to six months. If you get pregnant during the injection period, stop taking other vaccines and have strict prenatal checkups, and wait for the baby to be born before taking the injection. 1. After taking the quadrivalent cervical cancer vaccine: It is recommended to prepare for pregnancy around three to six months, although the effect of HPV vaccine on pregnant women and fetuses is still unclear, for the sake of the health of pregnant women and fetuses, it is best to wait for three months before considering pregnancy preparation. 2. Pregnancy during vaccination: If you get pregnant during the HPV vaccination, you don’t need to be nervous, you can pause the vaccination and do all the examinations during pregnancy. The rest of the vaccine will be given after the baby is born. After the quadrivalent vaccine is injected, the doctor needs to formulate an individualized treatment plan according to the specific situation to prepare for pregnancy or pregnancy.