Diabetes mellitus is usually diagnosed with the help of a series of blood tests. It is possible to diagnose all the stages of diabetes through blood tests i.e. Prediabetes, diabetes, and gestational diabetes. A person suffering from the symptoms of Diabetes mellitus should be tested regularly and the level should be monitored. This continuous monitoring of the blood sugar level can greatly help in avoiding the complications of diabetes mellitus. The series of blood tests include Fasting plasma glucose test Hba1c test Random plasma glucose test Postprandial glucose test