The HPV vaccine requires three injections, and if there are no special circumstances, the whole process will take about six months. It is recommended that you consider starting to prepare for pregnancy three months after the completion of the whole process. HPV vaccine is an antigen and although it has been inactivated and has less impact on the body, there are differences in the reaction to the vaccine during the injection process due to the different body types of each individual. Some women may have adverse reactions such as fever and allergy, which can affect the development of the fetus if they become pregnant at this time and is not conducive to treatment with medication and physical recovery. At the same time, it is important to take care to use contraception during the vaccination period, and in case of an unplanned pregnancy, it is recommended to stop the vaccination and wait 42 days after delivery before administering the remaining vaccine. There are no clinical cases of HPV vaccination affecting fetal development, so do not be overly nervous about an unplanned pregnancy, but have regular checkups and keep a good attitude.