Introduction: Any pregnancy that has occurred beyond the expected date of delivery (EDD) is referred to as post-dated or extended pregnancy. Objective: The main objective of this study is to assess the obstetric outcome of postdated pregnancy among patients at Dhaka Medical College Hospital. Method: This was a prospective observational type study. In this study, patients who have reached 40 weeks of gestational age were included patients who were aware of the date of the last menstrual period (LMP) along with the 1st-trimester obstetrics scan. In this study, patients who were not positive were removed from LMP. The research was carried out from January 2012 to December 2013 at Dhaka Medical College Hospital. This study was selected for 250 cases purposefully observational type study. Results: The study result indicates a fetus condition among the highest 95.5% of the 250 pregnant women were alive and 4.5 % died. Male baby and female babies were 49.5% and 50.5% respectively. After delivery, 75.33% of the baby admitted to the hospital, NICU 7.23%, and 17.44% did not admit to the hospital. The maximum of the management of pregnant women (87.5%) was a failure to cause oligo, and the rest was laparoscopy. Per patient operational analysis indicates the highest (75.59%) premature membrane rupture, 17.9% ectopic pregnancy, and 6.51% uterus rupture. Conclusion: Postdated pregnancy has a 50% recurrence risk for the next birth. The infection of the fetus in the form of fetal distress, meconium aspiration syndrome, birth trauma is at high risk of pregnancy. It also improves instrument delivery and operational delivery level.