The time to have a baby after a chest x-ray is generally recommended to be more than 3 months after the examination, because chest x-rays are used for the examination and have significant ionizing radiation, which may affect the woman’s body and the health of the eggs in the ovaries. In order to avoid a decrease in the quality of the eggs due to radiation, it is usually necessary to wait more than 3 months, as a woman forms a mature egg every month, so after a 3-month interval, the newly formed egg is no longer affected by the previous chest X-ray. It is not necessarily a problem within 3 months of the chest X-ray examination, but only to exclude the risk and avoid the impact of the previous chest X-ray examination. If the pregnancy is unknowing, you can decide whether to continue the pregnancy through the assessment of the prenatal diagnostic doctor according to the examination time and the dose of radiation. The fetal health can be ensured.