Mary received dental x-rays before discovering she was pregnant. She is concerned about potential radiation effects on the fetus. Radiation can damage cells and tissues in the body, as well as increase risks of genetic mutations. However, the dosage from a single dental x-ray is typically very low risk. A full report would evaluate tissue radiosensitivity, compare the dental radiation dose to risk thresholds in pregnancy, and aim to ease Mary's concerns about effects on her fetus.