 Diabetes in pregnancy or gestational diabetes GDM is a condition that, if left untreated, may lead to complications for the mother and her baby. It is still not known which is the best method to diagnosis GDM. The goal of this study is to compare three well-accepted methods for diagnosis of GDM using either 75 g or 100 g in the glucose tolerance test and determine which method is the easiest and least expensive to use in relation to the reference method used over the last 20 years. The goal is to see if they can equally predict the healthy outcome of the pregnant mother and her newborn. 