Diabetes mellitus (just called diabetes from now on) occurs when the level of sugar (glucose) in the blood becomes higher than normal. There are two main types of diabetes. These are type 1 diabetes (this usually starts in childhood or adolescence and requires insulin treatment from the start) and type 2 diabetes (this usually starts in adulthood and often can be managed with diet or tablets).
This is a companion discussion topic for the original article at https://patient.info/diabetes/diabetes-and-pregnancy