Introduction: Gestational Diabetes Mellitus (GDM) is a common medical complication during pregnancy, associated with significant maternal and fetal morbidity. This study aims to analyze the maternal and fetal outcomes in pregnancies complicated by GDM. Materials and Methods: A retrospective cohort study was conducted on 500 pregnant women diagnosed with GDM. Inclusion criteria included singleton pregnancies with GDM diagnosed by oral glucose tolerance test (OGTT). Exclusion criteria included pre-existing diabetes, multiple pregnancies, and chronic medical conditions. Data on maternal outcomes (e.g., cesarean delivery, preeclampsia) and fetal outcomes (e.g., macrosomia, neonatal hypoglycemia) were collected and analyzed.Results: The study found that 35% of women with GDM required cesarean delivery, 20% developed preeclampsia, and 15% had preterm labor. Fetal outcomes included macrosomia (18%), neonatal hypoglycemia (12%), and respiratory distress syndrome (8%). Detailed results are presented in five tables. Conclusion: GDM is associated with significant maternal and fetal complications. Early diagnosis and strict glycemic control are essential to improve outcomes.