Postpartum haemorrhage (PPH) is one of the most common causes of maternal morbidity and mortality throughout the world. PPH significantly leads to anaemia, infection, lactational failure, blood transfusion and psychological morbidity. Pregnancies involve significant health risks, even to women with no preexisting health problem. The main focuses of this work was to analyse different causes and risk factors for postpartum haemorrhage. It is responsible for around twenty five percent of maternal mortality in the worldwide and also reported as the general cause of maternal mortality in Asian continent. PPH is usually called as blood loss exceeding 500 mL following vaginal birth and 1000 mL following cesarean. additionally, the average blood loss at birth frequently exceeds 500 or 1000 mL, and symptoms of hemorrhage or shock from blood loss possibly unknown by the normal plasma volume augmented that occur during pregnancy. Proposed alternate metrics for defining and diagnosing PPH include change in hematocrit, need for transfusion, rapidity of blood loss, and changes in vital signs, all of which are complicated by the urgent nature of the condition. A total number of 400 cases who had vaginal delivery with blood loss of 500 ml or more and cases who had caesarean section with blood loss of 1000 ml were registered for case study. The general cause of maternal deaths in India is post-partum hemorrhage, reported in various researches and accounts for twenty five percent maternal deaths.