Ultrasonography has a major role in assisting the obstetrician toevaluate the pregnant uterus. Aim of this work is to measure. Thecapabilities of U.S. in evaluating the integrity of C.S. scar. Results: theLUS thickness by both TAU and TVU is thinner significantly in C.S.cases compared to the control. It was found that LUS thickness is thinnerin C.S. cases with alleged uterine contraction.