Abstract
            Introduction: Preeclampsia is a significant pregnancy complication characterized by  hypertension and proteinuria, potentially leading to severe maternal and fetal morbidity.  The pathophysiology of preeclampsia involves endothelial dysfunction, which may influence  various biochemical markers, including serum sodium levels.  
  Objectives: This study aims to elucidate the relationship between serum sodium concentrations  and preeclampsia severity.  
  Patients and Methods: This cross-sectional study was conducted in 2023 on 112 pregnant  women diagnosed with preeclampsia at Akbarabadi and Firoozabadi hospitals in Tehran.  Participants were categorized into mild/moderate and severe preeclampsia groups based  on clinical criteria. Data collection utilized a researcher-designed checklist that included  demographic information such as maternal age and body mass index (BMI), as well as clinical  details including delivery type, twin status, proteinuria levels, blood pressure, maternal  sodium concentrations measured before and up to 48 hours post-delivery, gestational age, and  fetal weight. The primary outcome was evaluating the correlation between maternal serum  sodium levels and the severity of preeclampsia.  
  Results: The study involved 112 women with an average age of 29.37 ± 6.33 years, among  whom 57 were diagnosed with severe preeclampsia and 55 with mild or moderate cases. The  analysis revealed that there was no statistically significant correlation between serum sodium  levels and the severity of preeclampsia (P>0.05).  
  Conclusion: The findings suggest that serum sodium levels may not be a reliable biomarker  for assessing the severity of preeclampsia in pregnant women, highlighting the need for  further research to explore other potential indicators that could better reflect the condition’s  severity and inform clinical management strategies.