assessment of abortion and some effective factors among of women referred to zanjan city hospitals

background: maternal mortality ratio of pregnancy complications and childbirth is one of the most important indicator which represents development in countries. sometimes unpleasant and dangerous side effects is undeniable among mothers. undrestanding of abortion frequency can be a indirect criterion of maternal health in a community. this study aimed to assess abortion and some effective factors among of wemon referred to zanjan city hospitals in 2012. methods: this study was a cross-sectional survey that performed in 545 pregnant women refereed to  ayatollah mousavi and imam hussein hospitals in zanjan city in 2012. the data collection tool was a questionnaire that  was four sections as demographic variables(11 items), midwifery history (12 items), probable causes of abortion(16 items).  gathered data was analysed by using spss-11.5 software based on descriptive (mean and sd) and interferee statitical( x 2 and logestic regression) tests. findings: in this study, the frequency of abortion and spontaneous was 12.1%(66 cases) and 9.5%(52 cases) respectively. also frequency of therapotic was 2.6%(14 case). there was significant difference between abortion and thyroid disease (p=0.01), unwanted pregnancy (p=0.01), the number of pregnancies (p=0.02), maternal age (p=0.003), maternal occupation (p< 0.001) , previous abortion (p< 0.001), distance of two recent pregnancy (p = 0.01) and occurrence of pregnancy during pregnancy prevention (p=0.03). findings revealead that employed mother (p=0.03) having one pregnancy(p< 0.001) and first pregnancy (p< 0.001) had higher odds ratio in abortion existance. conclusion: according to study results, providing goals are necessary for regarding to health fertility, maternal health and planning to promote them. also, it needs to provide better quality service to pregnant women with history of previous abortions.