The relation between prepregnancy maternal body mass index and total gestational weight gain with the characteristics of the newborns

Aims To evaluate the relationship between the maternal body mass index (BMI) and total gestational weight gain (GWG) with the characteristics of newborns, taking into consideration the birth weight (BW), weight for age score (WfA), length for age (LfA), and weight for length (WfL), APGAR score, and premature delivery. Methods We conducted a study, from March 2015 to 2016. We included a number of 1218 pregnant women who delivered single babies, from three different hospitals that serve the entire Mures County and who met our inclusion criteria. Results We did not find significant differences regarding weight, length at birth, and gestational age, between girls and boys, neither between total GWG during pregnancy and the measured anthropometric parameters of the newborns, or between maternal GWG and gestational age of the newborns. We found a positive correlation between the mothers' BMI and the BW of the newborns (p =.03,r = 0.06, 95% CI = 0.0036-0.1169), but not between BMI and the birth length and nor with APGAR score. The statistical analysis showed a positive correlation between BMI and LfA (p = .01,r = 0.07, 95%CI = 0.0141-0.1269), but not with WfA and WfL. Women with higher BMI before getting pregnant showed significantly higher frequency of preterm delivery (p = .0078). We found a statistically significant correlation between GWG and BW (p<.0001). Excessive GWG correlates statistically significant with BW (p < .0001). Conclusions We found a positive correlation between the mothers' BMI and excessive GWG and the BW of their newborns in women delivering a single baby. Women with higher BMI showed significantly higher frequency of preterm delivery.