Gestational diabetes, also known as gestational diabetes mellitus (GDM), is a sub-type of diabetes that is first identified during pregnancy. It consists of abnormal glucose tolerance or higher-than-normal blood glucose levels, which may or may not diminish following the birth of an infant. The prevalence of GDM in Canada has been on the increase, with approximately 5% of Canadian pregnancies in 2010/2011 reported to be affected by GDM. Although GDM is usually asymptomatic (shows no symptoms), it is associated with serious perinatal complications for both the mother and the child. However, with early detection and management, these complications can be minimized.