| Objectives:1.To investigate the effects of nutritional intervention in one day outpatient on blood glucose,weight control and pregnancy outcomes in pregnant women with gestational diabetes.2.To investigate the effects of nutritional intervention in one day of clinic outpatient on neonatal birth weight and hypoglycemia?Method: 320 pregnant women,who were diagnosed with gestational diabetes between 24 and 28 gestational weeks when taking examinations in the obstetric clinic in the Fourth Hospital of Shijiazhuang from January 2014 to December 2016,and who delivered in this hospital,were selected.These pregnant women with GDM were randomly divided into two groups,two in the intervention group were lost due to the midway of moving,and six in the control group dropped out.Finally,158 in the intervention group and 154 in the control group were determined.The research group was composed of pregnant women with GDM who participated in the one-day diabetes clinic for nutritional intervention.In the intervention method,individualized diets were made combining their body mass indexes(BMI)and intake of total energy per day based on regular nutrition clinic for food and exercise guidance.Pregnant women with GDM in the intervention group were expected to stay in the hospital from 7:00 a.m.to 19:00 p.m.,12 hours in total,to experience the nutritious meals of one-day clinic,including 3 meals and 2 snacks.They were also expected to have an idea and mastery of the types and calories of each meal and snack.They were accompanied by one nutritionist and one specialized nurse for the whole process,and were educated in terms of nutrition and health relating to diabetes,including relevant GDM knowledge,guidance on blood glucose monitoring,exercise guidance,relevant knowledge of medical nutrition therapy(MNT),such as food exchange and calorie calculation,etc.They also received individualized direction on nutrition,diet and exercise,etc.They were given the diet recommended by one-day clinic,as well as the monitoring table of blood glucose.After they went home,they controlled their diet and did proper exercises on their own according to the nutritionist's guidance.In comparison,the control group went through the routine nutrition clinic,where the pregnant women received the guidance on diet dealing with diabetes during their pregnancy,as well as on exercise,only once.Survey on awareness rate of knowledge relating to gestational diabetes mellitus was carried out on two groups of research objects through questionnaires one week after the intervention.After the first and second months of the intervention,tthe patients compliance scores,Weight increase,fasting blood glucose and 2h postprandial blood glucose,etc.during the pregnancy were monitored one week after the intervention and before they were hospitalized for delivery;after the delivery,relevant data of two groups of GDM pregnant women were obtained from the electronic medical record in hospital,including pregnancy outcomes and delivery methods,as well as the birth weight of newborn babies,occurrence of hypoglycemia,etc.Results:1.Materials and data collected from the research and follow-ups of two GDM groups showed that,the awareness rate of the knowledge relating to gestational diabetes mellitus in the intervention group was significantly higher than that in the control group after the participation of pregnant women with GDM in one-day nutrition clinic and the regular follow-ups of medical staff in WeChat groups,and the difference was statistically meaningful(P<0.05);2.According to the comparison of fasting blood glucoses one week after the intervention and blood glucose levels 2 hours after the breakfast in the two groups of pregnant women with GDM,both figures of the intervention group were smaller than those of the control group,indicating that the differences were statistically meaningful(P<0.05).However,the difference in terms of weight increase in the two groups did not imply any statistical meaning(P>0.05);3.It is discovered through clinical observation indexes of the pregnant women with GDM in both groups before the delivery in hospital that,the blood glucose levels 2 hours after the breakfast and lunch,as well as average weekly weight increase,were remarkably smaller than the figures in the control group,possessing statistical meaning(P<0.05);while the differ-ence of fasting blood glucose levels of the two groups of pregnant women with GDM after hospitalization and before delivery was not statistically meaningful(P>0.05).4.According to the comparison of delivery modes,as well as the maternal and fetal outcomes of pregnant women with GDM in both groups,differences in terms of cesarean section rate and hypoglycemia in newborns were not statistically meaningful(P>0.05);nevertheless,occurrence rates of hypertension of pregnancy,premature rupture of membranes,premature delivery and macrosomia,the birth weight of the newborn babies in the intervention group were obviously lower than those in the control group,and the differences had statistical meaning(P<0.05).Conllusion:1.Nutrition intervention mode of one-day diabetes clinic can raise GDM gradivas' awareness rate of nutrition,exercise,glucose and weight control,etc.of gestational diabetes mellitus,and help them to better follow the doctor's advice,promote their control over blood glucose and weight.2.Nutrition intervention mode of one-day diabetes clinic helps to control blood glucose after meals,weight increase and occurrence rate of hypertension of pregnancy?premature rupture of membranes and premature delivery.3.Nutrition intervention mode of one-day diabetes clinic is beneficial to improve pregnancy outcome,control the birth weight of newborn baby,and reduce the risk of macrosomia,that is thus worth clinical promotion and application.4.Nutrition intervention mode of one-day diabetes clinic does not influence the cesarean section rate and the hypoglycemia in newborns significantly. 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