Results: The prevalence of GDM with stable blood glucose after 3, 5 and 7 days of dietary restriction combined with physical activity by walking for 30 minutes per day were 71.2 95% CI [63.2 - 79.1], 84.8 95% CI [75.5 - 91.0] and 87.2 95% CI [81.3 - 90.0].