The effect of maternal positions and physical activity on the infant birth weight

Birth weight is determined by multiple factors including maternal socioeconomic and nutritional status, maternal and fetal morbidity and excessive physical effort and primi parity. We designed this study in the aim of analyzing the relationship between maternal positions and physical activity on the fetal birth weight. Our study is a Prospective cohort study involving 127 primiparaous referring of healthy clinics in Bojnourd with multiple sampling. A team composed of 4 interviewers completes the interview form including daily activity and objective form for mother body characteristic. Statistical analysis was performed by using ANOVA, T-test, univariance regression, multiple logistic regressions. The mean of birth weight regarded to body mass index were different. And women who were sweeping by hand- for at least 50 minutes per week -had newborns with lower birth weight (P=0.007). But it seems that walking and standing and all fours position for cleaning floor, sitting, squatting for washing clothes and dishes and the position during sleep cannot affect the birth weight.