Abstract: 【Abstract】  Objective：To research the perinatal outcomes of the gestational diabetes mellitus （ＧＤＭ） women who were diagnosed by repeated oral glucose tolerance test (OGTT） examinations. Methods：188 women were diagnosed GDM by preliminary OGTT examinations as GDM1 group, 38 women were diagnosed GDM by repeated OGTT examinations as GDM2 group, and 200 pregnant women with normal blood glucose as control group. Compared 3 groups′perinatal outcomes, such as postpartum hemorrhage, preterm labour, PROM, macrosomia. Results：GDM2 group had significantly more postpartum hemorrhage, PROM, large for gestational age fetus than control group（P＜0.05）. GDM2 group had more macrosomia than GDM1 group, the difference had statistic significance（P＜0.05）. Conclusions：Repeated OGTT examinations can improve the GDM diagnosis ratio, so that we can early diagnose and actively intervene GDM, and improve pregnancy outcomes.

Key words: 【Keywords】 , Diabetes, gestational, Glucose tolerance test, Pregnancy outcome