This research is a descriptive study that investigate the relationship between some of the personal – social characteritistics of mothers (such as age, education, occupation, parity)birth spacing and breast feeding (type of nutrition in the first 6 months of age, duration of lactation and the most of supplementary feeding) with growth status of children in first year. The site of this study is Tabriz. The sample size were 314 children who referred to 20 medical centers and the information were gathered through special forms. then these data were analyzed with step by step regression method. The results showed that there is a significant relationship between mothers education and childs height growth (p=0.0497), birth spacing with childs weight growth (p=0.0042) , continuity of breast feeding with childs height (p=0.0331) and head circumference growth (p=0.0038) and childs sex with his/her height- weight and head circumference in the first year of life. This study shows that promotion of mothers education, appropriate birth spacing and continuity of breast feeding can increase the velocity of growth in children.
