Lois Jovanovic, an international expert on diabetes in the pregnant patient, offers a thorough and informative overview of Gestational Diabetes Mellitus. She reviews the reasons for tight glucose control during pregnancy and what these goal numbers should be. Emphasis is placed on how to manage the pregnant patient with diabetes mellitus in terms of glucose monitoring and specific treatment recommendations based on the best known studies. A comparison of current insulins available is made, as well as, a brief discussion on which diabetic medications are acceptable in pregnancy.