Comparison Between the Role of Transabdominal Ultrasound Versus Transvaginal Ultrasound in Evaluation of Placental Invasion in Cases of Placenta Previa Anterior Wall With Previous Uterine Scar

Objective: To compare between the role of Transabdominal ultrasound versus Transvaginal ultrasound in evaluation of placental invasion in cases of placenta previa anterior wall with previous uterine scar applying the unified ultrasonographic descriptors suggested by the European working group on abnormally invasive placenta "EW-AIP' Also to evaluate the sensitivity and specificity of each criterion by comparing them with the final outcome of pregnancy Fifty pregnant women with persistent placenta previa (after 28 weeks' gestation) were prospectively enrolled into this study. Both transabdominal and transvaginal ultrasound were performed by two different operators who were blinded to the results of each other. the placenta was studied as regarding the exact loacalization and the unified descriptors were applied and evaluated by TAS and TVS. The ultrasound findings were analyzed with reference to the final diagnosis made during Cesarean delivery and histopathological examination