Nine-valent refers to the nine-valent human papillomavirus vaccine. It is not advisable to get pregnant during the nine-valent period, and it is generally recommended to prepare for pregnancy after an interval of more than three months after the vaccination. Nine-valent is a vaccine to prevent the occurrence of cervical cancer, usually need to be vaccinated three times within six months, adapted to unmarried women aged 16 to 26 years. Nine-valent is essentially a strain of human papillomavirus virus that produces an immune response after vaccination, and pregnancy at this time is prone to cause adverse effects on the fetus. At the same time, the safety of the nine-valent for pregnant women and fetuses has not been effectively proven, so it is not recommended to get pregnant during the vaccination period. To summarize, it is not advisable to get pregnant during the vaccination period, and it is generally recommended to take more than 3 months to prepare for pregnancy after the vaccination. It is worth noting that vaccination may cause fever, diarrhea and other adverse reactions, so it must be used reasonably under the guidance of the doctor.