Effects Of Prenatal Factors On Birth Weight Of Newborns

Objective:Maternal health during pregnancy plays a decisive role in the intrauterine development of the fetus.Based on the analysis of prenatal factors for mothers,the study will explore its impact on the birth weight of the newborn and try to provide the basis for promoting the healthy development of the offspring.Methods:Choose the mothers who did regular birth examination and planned to give birth in Wanzhou District Maternal and Child Health Hospital of Chongqing from May to October 2018 and their newborns as the study object,complete the relevant baseline questionnaire,depression scale survey and maternal serum vitamin detection.For categorical independent variables,ANOVA or t tests were used to compare birth weight between groups.For quantitative independent variables,Pearson correlation was used to analyze the linear correlation between birth weight.Finally,the relationship between prenatal factors and birth weight was analyzed by multi-factor linear regression,and the stepwise screening method was used for variable screening.Results:1.4 pairs of twins were excluded in the study.Finally,301 mothers and their newborns were collected and analyzed,293 of them completed the mid-pregnancy nutrient collection.The mean birth weight(3275±397)g,was slightly lower than the average level in Chongqing(3321±487)g,slightly higher than the national average(3232±555)g.2.Single factor analysis found that education(F=3.44,p=0.0335),term(t=-4.57,p<0.0001),fetal sex(t=2.76,p=0.0062),pre-pregnancy BMI(F=5.74,p=0.0036)and pregnancy weight gain(F=4.20,p=0.0159)may affect birth weight.3.After including the basic situation of pregnant women,past history,fetal basic situation,pregnancy weight related indicators,maternal vitamin level during pregnancy,pregnancy depression,then multifactor linear regression was carried out step by step,and it was found that the influence of education level,whether the fetus is full term,fetal sex,pre-pregnancy BMI,pregnancy weight gain degree on neonatal birth weight was still statistically significant.Conclusion:1.Birth weight increases with the mother’s pre-pregnancy BMI level and weight gain during pregnancy.2.Mother’s education level can affect the birth weight of the newborn to some extent.3.The study found that vitamin D insufficiency of pregnant women in the mid-pregnancy is more common,vitamin A and vitamin E insufficiency rate is lower.4.Active and correct intervention in maternal weight management,body nutrition and mental health,and creating a good intrauterine environment have an important role in promoting neonatalhealth.