Additional file 1: of Towards more accurate measurement of edge to os distance in low-lying placenta using three dimensional transvaginal ultrasound: an innovative technique

Demographic and ultrasonographic data for the study group. The file includes the relevant demographic data for study cases including age group, BMI, gestational age, parity and previous cesarean sections. Also, ultrasonographic parameters related to the study including placental locations, edge to OS diameters by both 2 D and 3 D US and internal os width. (XLS 39 kb)