X-Rays During Pregnancy
Pregnancy is a time to take good care of yourself and your unborn child. Many things are especially important during pregnancy, such as eating right, cutting out cigarettes and alcohol, and being careful about the prescription and over-the-counter drugs you take. Diagnostic x-rays and other medical radiation procedures of the abdominal area also deserve extra attention during pregnancy.
Diagnostic x-rays can give the doctor important and even life-saving information about a person's medical condition. But like many things, diagnostic x-rays have risks as well as benefits. They should be used only when they will give the doctor information needed to treat you.
You'll probably never need an abdominal x-ray during pregnancy. But sometimes, because of a particular medical condition, your physician may feel that a diagnostic x-ray of your abdomen or lower torso is needed. If this should happen - don't be upset. The risk to you and your unborn child is very small, and the benefit of finding out about your medical condition is far greater. In fact, the risk of not having a needed x-ray could be much greater than the risk from the radiation. But even small risks should not be taken if they're unnecessary.
You can reduce those risks by telling your doctor if you are, or think you might be, pregnant whenever an abdominal x-ray is prescribed. If you are pregnant, the doctor may decide that it would be best to cancel the x-ray examination, to postpone it, or to modify it to reduce the amount of radiation. Or, depending on your medical needs, and realizing that the risk is very small, the doctor may feel that it is best to proceed with the x-ray as planned. In any case, you should feel free to discuss the decision with your doctor.
Source: Food and Drug Administration (FDA)