Background: Placenta previa is a severe form of an obstetrics that is related with significant risk of maternal hemorrhage especially in the third trimester. Other research findings point out that a short cervical length might be associated with high risk of substantial postoperative bleeding in such patients therefore the need to further examine this possible relationship. Objectives: to assess whether short cervical length poses a threat to the occurrence of massive hemorrhage in placenta previa patients. Study Design: A Cross sectional study. Duration and place of Study: Department of Obs & Gynae " kalsoom maternity home Peshawar. From 17th Aug, 2021 to 17th Feb, 2022. Methods : A comparative cross-sectional comparative study was carried out in this study with 150 patients diagnosed of placenta previa. Cervical length was then determined through a transvaginal sonography at between twenty four and thirty two weeks of pregnancy. Hemorrhage data were also obtained from records with regard to estimated blood loss during delivery. Risk of hemorrhage comparison study was undertaken and statistical tools used were compare on patients with short and normal cervical lengths. The Mean age, Standard deviation and p-value for hemorrhage risk was also calculated in the two groups. Results: This group consisted of 150 patients, who had placenta previa; their was 31,5 years (SD ± 4,8). Five patients (4%) had an unknown cervical length, 45 patients (30%) had short cervical length < 2. 5 cm and 105 patients (70%) had normal cervical length. Hemorrhage of 1000 ml or more occurred in patients with short cervix in 65% of cases as compared with 25% of those with normal cervical length (p = 0. 02). Cohort data revealed mean estimated blood loss of 1200mL in women with short cervix compared to the 800 mL of blood loss in women with normal cervical length. Also, in regard to the diagnoses, 40% of patients with short cervix satisfied the criteria for blood transfusion as compared to 15% of patients with normal cervical length. Cesarean delivery was also more common in the short cervix group with 85% as compared to normal cervix group of 60%.