In 1964, John O’Sullivan published his original research describing abnormal cut off values following an oral glucose challenge in pregnancy. O’Sullivan laid the foundation for screening and diagnosis of gestational diabetes. We have learned a lot since that 1964 publication. In this session, we will review a new meta-analysis coming to print in November 2022 comparing the 1-step with the 2-step oral glucose tolerance test. We will also summarize data on point of care glucometers (capillary blood glucose) for diagnosing gestational diabetes. Is the use of POC testing devices for GDM diagnosis evidence-based? There’s an answer for that… And we will cover it.