Abstract: Psychological hardiness is a set of the personality characteristics which play a role as a source of strength when dealing with stressful life events. The greatest stress of every woman in their lives is pregnancy. So this studies have been conducted to assess relationship between demographic, obstetric factors and psychological hardiness in pregnant women referred to health centers in Mashhad . Method:This descriptive - correlative study was conducted on 500 pregnant women referred to 20 health centers in Mashhad. Random sampling method was used. Data collection tools were included: Demographic, obstetrics & gynecology Questionnaire, Hardiness Questionnaire (Survey questionnaire personal view Kobasa), and Perceived stress scale. Data were analyzed by statistical software SPSS version 16. Using ANOVA test, Kruskal-Wallis, chi-square test, Pearson correlation coefficient. The significance level was considered less than 0.05. Results:The mean score of hardiness in pregnant women was reported 92/4 ± 23/2 . Results of Pearson correlation showed that there was a significant inverse relationship between hardiness and perceived stress (r = -0.81, p <0.0001). Qualitative variables of demographic and obstetric were significantly associated with levels of psychological hardiness: Mother’s education (p <0.0001),Spouse’s education (p <0.0001), Mother's job (p <0.0001),Housing conditions (p <0.0001),Income (p <0.0001),History of Abortion (p <0.002), History of delivery (p <0.003),Previous childbirth experience (p <0.0001),Referring to health centers (p <0.04),Pregnancy status (p <0.0001), concerns about the baby's gender (p <0.0001). Quantitative variables such as maternal age (p <0.0001), number of alive children (p <0.032), number of abortions (p <0.002), gestational age (p <0.028) were also significantly related to the psychological hardiness of pregnant women. Conclusion: There is a relationship between demographic, obstetric characteristics and perceived stress and psychological hardiness. Hardiness is the most important character to cope with stress.so identifying characteristics of people is needed.

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