1. Cancer in pregnancy: identification of unanswered questions on maternal and fetal risks / G. Koren, M. Lishner and D. Zemlickis -- 2. The pregnant patient with malignant disease: maternal-fetal conflict / D. Farine and E.N. Kelly -- 3. Changes in drug disposition during pregnancy and their clinical implications / G. Koren -- 4. The role of the placenta in the biotransformation of carcinogenic compounds / L. Derewlany and G. Koren -- 5. Antepartum fetal monitoring in the oncologic patient / Y. Ezra and K. Panter -- 6. The Toronto Study Group: methodological notes / G. Koren, D. Zemlickis and M. Lishner -- 7. Motherisk: the process of counselling in reproductive toxicology / G. Koren and A. Pastuszak -- 8. Maternal and fetal outcome following breast cancer in pregnancy / D. Zemlickis, M. Lishner, P. Degendorfer, T. Panzarella, S.B. Sutcliffe and G. Koren.