You can’t get pregnant until three months after the CT examination, which has a certain amount of ionizing radiation. Early pregnancy will easily lead to a decline in the quality of the egg, the development of fertilized eggs abnormalities caused by embryonic sterilisation, spontaneous abortion, congenital malformations, etc., the chances of pregnancy caused by a certain impact, mainly with the length of time to accept the radiation, the distance, the site and the dose has a relationship. The maturation period of egg cells usually takes three months, and the effects on the fetus caused by preparing for pregnancy after the disappearance of ionizing radiation will be greatly reduced. Women in the first trimester of pregnancy should pay attention to avoid bacteria, viruses, radiation, drugs and other adverse effects on the body, and also oral folic acid medication to prevent the occurrence of fetal malformations, but also to enhance the body’s resistance and immunity, the body will be adjusted to a state of health is conducive to pregnancy.