Study on Association of Placenta Previa with Previous Cesarean Section Pregnancy

Background: Placenta previa is an obstetric complication in which the placenta is extending into lower uterine segment up to or covering the cervical os. Caesarean section is one of the important risk factor for placenta previa. It is a leading cause of APH and it affects approximately 0.5% of all labours.With the recent rise in the caesarean delivery rate, it is of great value to study the placental location among prior caesarean delivery patients. This study would serve as a hospital based study in assessing the magnitude of placental location abnormalities in previous caesarean patients. Methodology: 400 subjects with history of previouscaesarean Section were selected for study purpose. 400 subjects withno previous history of caesarean section were selected for control purpose. Clinical examination and USG was done at term and subjects are followed till delivery. Study was conducted in Government Maternity Hospital, Tirupati. Results: 24 cases of placenta previa were found in the study group and incidence is 6%compared to incidence of only 1.75% (7cases) in control group (p< 0.05). Adherent placenta is also increased in study group (4cases) compared to control group (1 case).