Question 1: What exactly is X-rays? It is an electromagnetic wave with a certain wavelength and frequency. x-ray has a very short wavelength and great energy, and its wavelength is between ultraviolet light and gamma rays. x-ray wavelength for diagnostic imaging is 0.008-0.031nm. x-ray will be weakened by the absorption of calcium-containing components such as bone, water (blood, etc.), and soft tissue (muscle) when it penetrates the body. Using different substances absorbed differently and the image taken in varying intensity is the X-ray film. Question 2: What is the exposure dose for various types of X-ray examinations and what is the risk to pregnant women? Usually the fetus receives 0.07 roentgens (rads) of x-ray dose during an x-ray examination. It is generally believed that the fetus absorbs more than 10 roentgens (rads) of x-ray dose during the first four months of pregnancy to be prone to malformation. If a pregnant woman does need an X-ray after a full assessment, it is recommended that she wear lead shielding for pregnant women to reduce radiation, especially to the abdomen. Question 3: What should I do if I have X-rays during pregnancy? Do I need an abortion? The opinion of the International Commission on Radiological Protection (ICRP) is that a decision to terminate a pregnancy based on radiation risk is not justified at a fetal absorbed dose of less than 100 mGy (1 Gy = 100 roentgens), or 10 roentgens. The vast majority of intrauterine exposures to X-rays and their health risk levels are safe and rarely justify termination of pregnancy. The risk of malformation, developmental delay, central nervous system damage and IQ reduction should be carefully considered at intrauterine exposure doses in the range of 100-500 mGy (often therapeutic doses, very rare) in the 8th-15th weeks of pregnancy The above is a professional opinion, let’s have some layman’s interpretation. 1.The radiation of X-ray needs to be accumulated to a certain amount before it can cause teratology, and the dose of exposure of single X-ray examination cannot reach the dose that can cause embryonic or fetal harm. 2, foreign clinical research shows that early pregnancy (note: here refers to before the fourth week of pregnancy, that is, from the first day of the last menstruation after 28 days) received X-ray exposure, the baby in the womb only two results: the first result is that the baby received all the adverse effects, natural miscarriage; the second result is that the baby did not suffer adverse effects, the natural growth of normal. 3. In the middle and late stages of pregnancy, it is often the therapeutic dose of X-rays that can easily lead to fetal malformations. Despite this, clinical doctors are very cautious about X-rays during this period and try to reduce unnecessary X-rays, but it doesn’t mean that X-rays can never be done during pregnancy, just to minimize the possibility of teratogenicity. How soon can I have a baby after an X-ray? If an X-ray is taken before the 4th week of pregnancy in the case of an unplanned pregnancy, and if the embryo is not aborted by spontaneous miscarriage, you can consider keeping the baby on an “all or nothing” basis. However, for couples planning or preparing for pregnancy, it is possible to test for pregnancy before taking an x-ray to confirm that you are not pregnant. The International Commission on Radiological Protection (ICRP) recommends that there should be a period of freedom from x-ray exposure before pregnancy, and for insurance purposes, the general recommendation is to avoid pregnancy for 3 months after x-ray exposure, for both men and women. Opinion.