Frequency of Placenta Previa on Ultrasonography in Females with History of Caesarean Section

Background: Placenta previa (P.P) is a condition where the lower edge of the placenta lies close to the internal os. It may partially or completely cover the internal os. Objectives: To determine the frequency of placenta previa on ultrasonography in females with history of Caesarean section. Methodology: This descriptive study was held in Ghurki Trust Teaching Hospital Lahore and Tehsil Headquarter Hospital, Pattoki. Convex Probe Esotae 2.5 5-7MHz and Logiqv3 (5-7MHz) was used in the study. 140 pregnant women with history of previous Caesarean section were included in the study and were examined through convenient sampling. Data was collected after signing the consent form. Statistical software for social sciences (SPSS version 22.0) is used for the analysis of data. Results: According to the data analysis, minimum age patient was of 18 years and maximum age was 41 years. 37(26.4%) women had 1 previous Caesarean section. 57(40.7%) women had 2, 31(22.1%) women had 3, 15(10.7%) had 4 of previous Caesarean sections. 86(61.4%) women had a history of bleeding. 54(38.6%) women had no history of bleeding. According to analysis of placenta previa, 126(90.0%) women did not have a placenta previa and 14(10.0%) women had placenta previa. Cross tabulation analysis between frequency of patients with placenta previa and previous Caesarean cases evaluated that 126 patients with previous Caesarean rate did not placenta previa confirmed on ultrasound whereas 14 patients with previous Caesarean section had placenta previa on ultrasound. Conclusion: Placenta previa is seen in ten percent of subsequent pregnancies in females who have a history of previous Caesarean section.