The main purpose of this study was a comparison of physical activity and body mass index in women with and without miscarriage experiences. The relationship between physical activity and body fat levels is completely unclear, despite large number of studies. It has been estimated that, unless effective action is taken, about one-third of adult women would be obese by 2010. Modifiable physical activity and sedentary diet behaviors are associated with morbidity and mortality, and improving these behaviors in all populations, including women, is a national health priority. Studies showed that light physical activity or sub maximal aerobic training not only improves the health of mothers, but also would have potential long-term beneficial effects on the fetus health. Therefore, in the current study, women with (N=54) and without miscarriage (N=70) experiences were compared by, Beck physical activity questionnaire, and body mass index (BMI). For statistical analysis was used SPSS software and independent T-test statistical method. All statistical operations were performed in confidence distance = 95%, alpha = 5% .The results showed that, there was a significant difference between women without and with miscarriage experiences in term of their body mass index and physical activity (P <0.05). Women without miscarriage experiences had desirable weight in terms of physical activity and were more active than women with miscarriage experiences. Women with miscarriage experiences had overweight. Current study indicated that increasing physical activity and reducing obesity are the greatest priorities for enhancing women’s health. The appropriate physical activity programs are optimal to help preventing chronic disease such as obesity and overweight in women, and are most beneficial for miscarriage and development. It is necessary, obese women must to reach the desired weight in prior to pregnancy. Results from this investigation help provide direction for future research effort
