Results
A total of 120 female students (60 in experimental group and 60 in control group) studying in secondary school (first grade) participated in this study. The means and standard deviations of the students’ age for experimental and control groups were 11.78±0.8 and 11.8±0.8, respectively, that indicated no statistically significant difference (P=0.46). Thirty one (51.7%) students in experimental group and 22 (36.7%) in control group were the first child of the family. There was no significant difference between experimental and