Fig. 1From: Intrapartum ultrasound measurement of the lower uterine segment thickness in parturients with previous scar in labor: a cross-sectional studyTrans vaginal ultrasound during first stage of labor with empty bladder, measuring the Lower Uterine Segment (LUS) and the LUS with posterior UB wall, which shows a normal LUS thickness (2.5Â mm). M: myometrium, F: fetus headBack to article page