The risk of contracting cancer is approximately 1 out of 1,000 pregnancies. The most common types of cancer include melanoma, cervical cancer and breast cancer. Utilization of MRI studies for radiological examination of cancer during pregnancy is recommended. Mammography and chest radiography are also allowed. Computed tomographic scanning of the abdominal region should be avoided. The prognosis during pregnancy is dependent on the extent and histologic type of the cancer. Chemotherapy can be started after the first trimester of pregnancy and terminated about one month before delivery.