The clinical impact of pregnancy found after chest X-ray is that it may lead to fetal malformation, because chest X-ray is performed under X-ray, which has strong radiation, and the radiation will lead to fetal malformation. Moreover, it takes about 3 months for the radiation to remain in the body before it is completely cleared. If pregnancy is found after the chest X-ray, it is advisable to terminate the pregnancy because it is not conducive to eugenics. When a woman plans to get pregnant she must not have an X-ray during the preparation period, unless it is an emergency to have a chest X-ray. In addition, CT examinations also have strong radiation, which can also cause fetal malformations. It is recommended to have an ultrasound examination first to understand whether the current embryo development is normal.