Pregnancy hormones generally do not cause lung nodules to become larger, and there is little relationship between the two. In pregnancy, hormones such as human chorionic gonadotropin, estrogen and progesterone are elevated, and these hormones generally do not affect lung nodules and do not cause them to enlarge, so there is no need to worry too much. However, when the lung nodules are found to be enlarged, it is necessary to pay attention to them, consult the doctor in time, and improve the relevant examinations to clarify the nature of the nodules. If you have a history of lung nodules, but the nodules are small, less than 8mm, and you do not have any symptoms, you can get pregnant and the pregnancy will not affect the nodules. If you are not sure, you can repeat the chest CT after delivery to check whether the nodule has increased in size. Consult your physician for details.