A comparison of pre-pregnancy BMI and gestational weight gain on gestational diabetes mellitus in pregnant women referred to Asali hospital in 91-92

In addition to adequate nutrition and balance of nutrients in the pregnant mother's diet, maternal weight gain during pregnancy has a major impact on maternal health and fetal well-being. The purpose of this study was to compare pre-gestational BMI and gestational weight gain on GDM according to the new definition of GDM. This descriptive cross-sectional study was carried out on 18 to 35 years old pregnant women with no underlying disease using convenience sampling method In the first months of pregnancy, women's height, weight and blood pressure as well as FBS were measured.The second assessment was done in the 24th-28th weeks of gestation using repeated measurements of weight, blood pressure, and gestational diabetes screening test (GCT). The third evaluation was conducted at the end of pregnancy to measure mother and infant weight.The data was analyzed by SPSS, version 16, t-test and Mann-Whitney test. In this study, 600pregnant women were evaluated.Mean BMI befor pregnancy in the women with GDM was significantly higher than in the women without the above-mentioned problems(P=0.0001). The mean weight gained during pregnancy in the women with these symptoms was significantly higher than that in the women without the above –mentioned problems(P=0.039)(P=0.0001). Compared to pre-pregnancy BMI, weight gain during pregnancy had a higher with GDM(0.278 vs 0.077). Pre-pregnancy BMI in comparison with weight gain during pregnancy, had a higher correlation with GDM and macrosomia