Objective: To determine the frequency of retained placenta and common factors leading to it among patients presenting with postpartum hemorrhage. Material and Methods: This study was conducted at Obstetrics and Gynecology Unit, Kalsoom Maternity Hospital, Peshawar, Pakistan from January 2015 to December 2015. A total of 295 patients were observed by keeping 25.8% proportion of pre term labor as a factor leading to retained placenta, 95% confidence interval and 5% margin of error using WHO sample size calculations. Results: This study was conducted among 295 patients in which mean age was 32 years ± 1.23 SD. Twenty percent patients had retained placenta in which 25% were unbooked, 30% had low lacental weight, 30% were grand multi -parity, 35% had preterm delivery, 22% had previous dilatation and curettage and 13% had previous ceaserian section. Conclusion : Retained placenta will continue to occur but the morbidities and even mortality could be reduced to the barest minimum with excellent antenatal care.