Lois Jovanovic, an international expert on diabetes in pregnancy, offers a thorough and informative overview of the Diabetic who becomes pregnant. She reviews the reasons for tight glucose control during pregnancy and the factors that contribute to macrosomia. Emphasis is placed on where to focus management in the pregnant patient with diabetes mellitus in terms of glucose monitoring and tight control. The issue of how exercise effects pregnancy and which exercises cause less fetal bradycardia is discussed.