If you agree to take part in this study, information about the type of cancer, the type of treatment you have had or are having, and details about your pregnancy will be collected for the database. Data will be collected from patients seen at MD Anderson since September 2003 until data has been collected for 500 cases. This information will serve as a basis for future studies about pregnant women with cancer. You will receive no special tests or treatment at MD Anderson as a result of this study.