World Health Organization (WHO) thresholds for positive two-hour 75 gram oral GTT (2013)

A diagnosis of "gestational diabetes" is made when one or more of the glucose criteria described above are met. By comparison, a diagnosis of "diabetes mellitus in pregnancy" is made when one or more of the following criteria are met: fasting plasma glucose ≥126 mg/dL (7 mmol/L), two-hour plasma glucose ≥200 mg/dL (11.1 mmol/L) following a 75-gram oral glucose load, random blood glucose ≥200 mg/dL (11.1 mmol/L) in the presence of diabetes symptoms. There are no established criteria for the diagnosis of "diabetes mellitus in pregnancy" based on the one-hour post-load value.