If you find out that you are pregnant soon after having intercourse a week after having a chest X-ray, you can usually have the baby, but you should pay attention to regular screening in the hospital to determine the development of the fetus. If you have intercourse one week after having a chest X-ray, you have basically avoided the direct effects of radiation, and even if the germ cells were exposed to radiation before, the probability of damage is very small, and the possibility of causing abnormal division of the germ cells is unlikely. Overall radiation damage effects are all or nothing, clinically most do not cause abnormal fetal development, usually can be. However, after the chest X-ray found pregnant, pregnancy to do a good job of comprehensive pregnancy test, through ultrasound and other observation of fetal development, especially four-dimensional ultrasound and chromosome gene screening, etc., if there is no abnormality in the whole pregnancy, usually the baby is safe. If abnormal fetal development is found during pregnancy, please consult the hospital in time and take timely treatment to avoid adverse consequences.