Dental CT can be used to prepare for pregnancy, but in order to be safer, it is recommended to prepare for pregnancy 3 months after the dental CT examination. 1. The radiation dose received during dental CT examination is relatively small, and usually does not have a significant impact on pregnancy preparation, but as long as the radiation exposure may have a certain risk of teratogenicity to the fetus, only the risk posed by dental CT examination is smaller. Therefore, in order to be safer, it is generally recommended to prepare for pregnancy 3 months after the dental CT examination to minimize the impact on the fetus. 2. During the preparation period, both husband and wife should avoid exposure to radioactive substances, quit smoking, have a regular work and rest schedule, ensure adequate nutrition, and take appropriate vitamin and folic acid supplements. When undergoing CT, X-ray and other radioactive examinations, you should inform your doctor in advance of your pregnancy preparation needs, so as to avoid interfering with your pregnancy preparation plan. If you find out that you are pregnant after a dental CT examination, do not be too alarmed, but go to the hospital in time to complete the examination and treatment according to the doctor’s guidance and recommendations.