It is possible to continue the pregnancy if you do not know you are pregnant, but you should do all the tests during the pregnancy, especially NT screening, Down’s syndrome screening and 4D ultrasound screening, etc. If abnormal fetal development is found during the pregnancy test, it is recommended to continue the pregnancy under the guidance of the doctor and terminate the pregnancy if necessary. The chest X-ray examination uses X-rays and has a certain amount of radiation, but the chance of the fetus having abnormalities due to a single examination is relatively small. If you are worried about abnormal development of the fetus, you can also consider terminating the pregnancy, which is recommended within 49 days of pregnancy, and within 49 days you can choose a medical abortion to minimize the damage to the body. Women of childbearing age who usually have a normal sexual life and exceed the normal menstrual cycle are advised to exclude the possibility of early pregnancy before performing tests with radiation to avoid the effects of the test on the fetus.