Diabetes is due to either the pancreas not producing enough insulin or the cells of the body not responding properly to the insulin produced. There are three main types of diabetes mellitus Type 1 DM results from the pancreas's failure to produce enough insulin This form was previously referred to as " insulin-dependent diabetes mellitus"(IDDM)or juvenile diabetes Type 2 DM begins with insulin resistance, a condition in which cells fail to respond to insulin properly. non insulin-dependent diabetes mellitus"(NIDDM)or"adult onset diabetes Gestational diabetes is the third main form and occurs when pregnant women without a previous history of diabetes develop high blood sugar levelsDiabetes is due to either the pancreas not producing enough insulin or the cells of the body not responding properly to the insulin produced.There are three main types of diabetes mellitus: Type 1 DM results from the pancreas's failure to produce enough insulin. This form was previously referred to as "insulin-dependent diabetes mellitus" (IDDM) or "juvenile diabetes". Type 2 DM begins with insulin resistance, a condition in which cells fail to respond to insulin properly. "non insulin-dependent diabetes mellitus" (NIDDM) or "adult￾onset diabetes". Gestational diabetes is the third main form and occurs when pregnant women without a previous history of diabetes develop high blood sugar levels