Which type of diabetes is primarily associated with polyuria?

Polyuria, the condition characterized by excessive urination, is primarily associated with Diabetes Insipidus. In this condition, the kidneys are unable to conserve water, leading to increased urine output. This occurs due to a deficiency of the hormone vasopressin (also known as antidiuretic hormone, or ADH) or due to the kidneys' insensitivity to this hormone.

Diabetes Mellitus can also cause polyuria, but it does so as a secondary effect of high blood sugar levels. When blood glucose levels exceed the renal threshold, glucose spills into the urine, drawing water with it through osmotic diuresis. While it's correct that Diabetes Mellitus can lead to polyuria, Diabetes Insipidus is specifically and primarily associated with hyposensitivity or a lack of vasopressin, making it the more straightforward link to the condition of excessive urination.

Gestational Diabetes affects blood glucose levels during pregnancy and may not prominently feature polyuria by itself. Type 2 Diabetes, while a form of Diabetes Mellitus, similarly associates polyuria with high blood sugar but does not distinguish in direct relation to the condition of polyuria as clearly as Diabetes Insipidus does. Therefore, the best answer for the type of diabetes primarily