After the first shot of nine-valent pregnant need to be ultrasound examination under the guidance of the doctor, the embryo is well developed can continue to pregnancy, and strictly on time maternity examination. Nine-valent vaccine refers to cervical cancer vaccine, can effectively prevent the occurrence of cervical cancer, to be vaccinated under the guidance of a doctor. As the effect of the vaccine on pregnancy is still unclear, vaccination is prohibited for women who are preparing for pregnancy, pregnant and breastfeeding. When the first vaccination after unwanted pregnancy ultrasound examination embryo development is good can continue to pregnancy, but should follow the doctor’s advice strict prenatal examination, in order to rule out the possibility of abnormal fetal development. It takes half a year to receive the full vaccination, and contraceptive measures should be taken when having sex during the vaccination period. However, when an unplanned pregnancy occurs, the vaccination can be suspended, and obstetric examinations should be conducted on time according to the doctor’s instructions, and the vaccination can be continued for the rest of the vaccine at the end of the delivery period, or even at the end of the breastfeeding period.