Whether or not having a CT without knowing that you are pregnant has any effect varies from person to person, as the effect on pregnancy varies depending on the individual’s sensitivity differences, the radiation dose, and the absorbed dose of radiation. If you have a CT without knowing that you are pregnant, you are usually in the early stages of pregnancy. CT belongs to the radioactive examination there is a certain amount of ionizing radiation, in the early stages of pregnancy is the most critical stage of the development of embryonic organs, and for some harmful factors will be more sensitive, may lead to the development of embryonic deformities or stillbirths. However, the effect on the fetus is not absolute, because each woman for radioactive sensitivity differences, radiation dose, absorption dose of different, most of the impact on the fetus is small. It is recommended to go to the regular hospital in time to improve the appropriate examination, if there is no fetal abnormality found. Generally, you can continue the pregnancy, do a good job of regular pregnancy checkups, and go to the hospital in time to deal with any abnormalities.