There are three main types of the disease diabetes mellitus: gestational diabetes (occurring in pregnant women), type1 and type2.

Gestational diabetes is similar to the second type of diabetes since it’s caused by insulin resistance, caused by the hormones generated by the body during pregnancy. This creates a need of abnormally high levels of insulin and results in diabetes when the beta cells are not able to satisfy this demand. Type 1 diabetes is usually an autoimmune disorder caused by resistance to insulin in the target tissues. All three types of diabetes occur because of malfunctioning of beta cells in the pancreas, because they are unable to secrete enough insulin to keep the blood sugar level at a normal level, resulting in hyperglyceamia.