Generally, people talk about there being 3 (main) types of diabetes:
Type 1, Type 2 and Gestational diabetes.

TYPE 1 DIABETES

T1D is an auto-immune disease and this type of diabetes accounts for 10-15% of all people with the disease. In the past T1D used to be called Juvenile Diabetes; it was once also referred to as Insulin Dependent Diabetes Mellitus or IDDM.

TYPE 2 DIABETES MELLITUS

T2D is the more common form of diabetes, affecting around 85% of people with diabetes worldwide. Type 2 used to be referred to as Mature-Onset Diabetes; it was once also referred to as Non-Insulin Dependent Diabetes Mellitus or NIDDM

GESTATIONAL DIABETES

Or GDM for short, has been defined as “a carbohydrate intolerance of variable severity with the first onset or diagnosis during the current pregnancy”…

HOW IS DIABETES DIAGNOSED?

Diabetes is usually diagnosed through 2 abnormal pathology results or through 1 abnormal pathology result in the presence of symptoms of hyperglycaemia (high blood glucose levels)