Huma Tahseen, Tayyaba Tahira, Sidra Hafiz, Zahida Noreen.
Placenta Previa: a Comparative study of Obstetrics Outcome in Previously Scarred and Unscarred Uterus at services Hospital, Lahore.
Pak J Med Health Sci Jan ;12(3):889-91.

Aim: To compare the incidence of placenta Previa, placental position, maternal and fetal outcome in scarred [group A] and unscarred uterus [Group B] in one year of study at Services Hospital. Methods: In this cohort study, 57 pregnant women beyond 28 weeks of gestation complicated by placenta Previa were identified. These cases were divided into two groups, scarred uterus [Group A, n=35] and unscarred uterus [Group B, n=22]. Total 4340 deliveries occurred, out of which 1890 had caesarean section and 57 patients had placenta Previa. Results: The frequency of placenta Previa was significantly higher in scarred cases as compared to overall incidence. Majority of the scarred cases had anterior placenta [74.4%] and majority of unscarred uterus had posterior placenta [25.7%]. A significant association of placenta Previa following curettage in Group B were observed. There was only one maternal mortality in Group Aand none in Group B. Conclusions: The risk of placenta Previa increases with increase in number of previous cesarean section and advanced maternal age.

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