Background: Motor proficiency plays an important role in mobility. But various factors have effect on the motor proficiency. The purpose of this study was to compare the effect of body mass index, and age on motor proficiency in children, adolescents, and adults. Methods: This research is descriptive type causal comparative study. 360 boys from Tehran (120 people for each age group) were selec...

  Background and Aim: Pregnancy is a physiological event that may cause significant complications (5-20%) in mother and fetus. One of the dangerous factors in the pregnancy is abnormal Body Mass Index (BMI) before pregnancy. The purpose of this study was to determine the relationship between maternal pre-pregnancy body mass index and childbirth outcomes in primiparous women.   Material and Meth...