Background: Sleep disorders are common complaints during pregnancy and can be suitable for many disorders during pregnancy and the postpartum for mother and the fetus. The aim of this study was to assess sleep quality in pregnant women in the third trimester of pregnancy referred to health centers of Mashhad. Methods: A total of 168 eligible women referred to health centers participated in this descriptive study. Data was collected with using Demographic & Obstetricial form and Pittsburgh Sleep Quality Index (PSQI) and continuous sampling. Then data were analyzed with using SPSS software version 11.5 and descriptive and analytical statistics. Result: This study showed that the average of sleep quality in the third trimester was 8.27±2.91 and 89/88% of pregnant women had poor sleep quality. Also, increased maternal age (P=0.04) and decreased physical activity (P=0.003) was associated with poor sleep quality. Also, women with poor sleep quality, had greater number of visits to the doctor's office (p=0.002). Nocturnal Awakening due to frequent urination (61.3%) and changing situation in bed (56.0%) allocated the highest amounts to them. Conclusion: Considering the high prevalence of sleep disorders in pregnant women, it is important to find and implement the safe ways to improve sleep quality in pregnant women.

Keywords: Pregnancy, Pregnant, Sleep Quality

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