Introduction: Pregnant women are always faced with common physical and mental problems during pregnancy and postpartum. Self-care through social networks as an effective and influential factor in women's empowerment can improve their physical and mental health. The aim of this study was to investigate the role of social networks in improving women's self-care during pregnancy and postpartum.Material and Methods: This cross-sectional study was conducted through a researcher-made questionnaire. We invited 285 pregnant women referred to Fasa medical centers (Shiraz, Iran). 110 pregnant women agreed to participate in the study. Finally, according to the inclusion and exclusion criteria, 96 pregnant women entered the study and completed the questionnaire. Data were analyzed using descriptive statistics (mean, standard deviation, percentage, frequency) and analysis of variance with SPSS 22.Results: Among the 44 roles of social networks in the self-care processes during pregnancy and postpartum "regular use of drugs and supplements" (4.43 ± 0.81), "timely and regular tests (screening, etc.) and “timely and regular tests (screening, etc.) and ultrasounds during pregnancy" (4.22 ±0.90) and "communication with a public health expert in health homes"(4.07 ±0.97) were the most important roles." Management, control and improvement of foot edema" (1.71 ±1.01), "Management and control of complications due to iron deficiency" (1.97 ±1.11) and "Social support" (2.25 ±1.17) were the least important roles.Conclusion: Social networks as an important source of information can help to improve women's self-care processes during pregnancy and postpartum.