Diagnostic Accuracy of Placental Thickness in Lower Uterine Segment Measured By Ultrasound in Prediction of Placenta Accreta Spectrum in Patients With Placenta Previa. A Diagnostic Test Accuracy Study

The maximum placental thickness in the lower uterine segment will obtained using trans-abdominal ultrasound scan. For the image to be deemed suitable, a midline sagittal section of the lower uterine segment (with the implanted placenta) and the cervical canal, with the intervening urinary bladder will be required (Bhide et al., 2019). The measurement will be performed by a researcher who will be blinded to the final diagnosis.