After multivariate regression analysis, there are 05 independent risk factors that increase the risk of an abnormal postpartum glucose tolerance test: Insulin treatment in pregnancy, OR = 4.52; 95% CI [1.70 - 11.98]; Preterm birth OR = 3.28; 95% confidence interval [1.10 - 9.9]; Fasting blood sugar OR = 3.49; 95% confidence interval [1.53 - 7.98]; 1 hour blood sugar OR = 2.98; 95% confidence interval [1.35 - 6.59]; 2-hour blood sugar OR = 3.00; 95% confidence interval [1.31 - 7.06].