You can start to prepare for pregnancy 3 months after the completion of cervical cancer vaccination. The cervical cancer vaccine, HPV vaccine, is an inactivated viral vaccine. There are three types of HPV vaccines, bivalent, quadrivalent and 9-valent, available in China to prevent different types of high-risk HPV subtypes, which need to be administered in three doses and take six months to complete all injections. Although there is no clear evidence to confirm that HPV vaccine is teratogenic to the fetus, it is generally recognized that contraception is recommended during the vaccination period and that the body should prepare for pregnancy 3 months after the completion of the vaccination and after the production of antibodies in the body. If pregnancy occurs during the vaccination process, regular obstetric examinations and screening for teratology should be done, and the remaining HPV vaccination should be received after the birth and breastfeeding are completed, but with reduced effectiveness. There are many HPV virus high-risk subtypes, and the HPV vaccine only protects against several of them. Annual cervical cancer screening is still required after HPV vaccination.