Abstract : The prevalence of gestational diabetes increases as a result of universal screening, but also because of more stringent diagnostic criteria due to decreased set points. This diabetes can lead to severe complications for the offspring and / or for the mother. The management of a patient suffering from gestational diabetes is based on healthy diet and lifestyle advices. Iterative control of capillary glycemia is the usual way to monitor daily blood glucose. Continuous blood glucose measurement (CGM) provides reliable and comprehensive data over several days. Observing and interpreting the continuously recorded glucose concentration values should help to better understand the kinetics of glucose and to personalize the treatment. This preliminary study reports the results of 12 women with gestational diabetes and describes fluctuations of blood glucose levels all day long, particularly in the postprandial period. The CGM analysis shows that the maximum concentration of postprandial glucose is reached approximately 70 minutes after the morning and midday meals and 110 minutes after the evening meal.