The quadrivalent cervical cancer vaccine has to be administered in 3 doses, and it is best to go back to pregnancy more than 6 months after the last dose. Because the cervical cancer vaccine is a viral extract, it may take at least six months to be completely metabolized in the body, and from the perspective of eugenics, it is better to prepare for pregnancy at least six months later. However, some foreign literature states that if an unwanted pregnancy is found during the intramuscular cervical cancer vaccination, if you want to have a baby, you can continue the pregnancy and its effect on the baby is not very big, and the cervical cancer vaccine will be given after the birth of a child. However, from the eugenic point of view, it is recommended to strictly use good contraception during the vaccination, and to prepare for pregnancy after six months after the last injection.