After having a CT of the lower back, it usually does not affect the sperm and egg cells, so it does not affect pregnancy and you can prepare for pregnancy normally. CT examination belongs to radioactive examination, under normal use, usually small radioactivity, will not affect the development of reproductive cells, so if in the state of preparation for pregnancy, after the CT of the waist according to the original plan to prepare for pregnancy can be, do not need to worry about, do not have to prolong the time to have a child. It is recommended to prepare for pregnancy under the guidance of the doctor, if after the CT of the waist, preparation for pregnancy, then you need to develop a good habit of pregnancy test, regular checkups in the hospital, if there is abdominal pain and other symptoms, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, and make a reasonable treatment.