The goal of this paper is to present the chronological development of knowledge about diabetes mellitus from the time of Hippocrates, through Langerhans and White, how it was discovered that inadequate pancreatic function was the cause of diabetes mellitus, and that the kidney was just an organ that became weaker due to unregulated pancreatic function. Studying gestational diabetes mellitus leads to a better control of diabetes in pregnancy, better perinatal outcome with fewer peripartal and perinatal complications. In the second part of the paper, there is a review of literature available on the Web of Science, containing the number of papers published over the years, as well as areas and countries they had been published in.