What is the risk of uterine rupture in a woman with one prior lower transverse cesarean section (LTCS)?

The risk of uterine rupture in a woman with one prior lower transverse cesarean section (LTCS) is most accurately represented by the choice indicating a risk of 0.5%. This figure is widely accepted in clinical literature and guides for obstetric practice.

Lower uterine segment incisions made during cesarean sections are typically associated with a lower risk of rupture in subsequent pregnancies compared to classical or vertical incisions. The uterine scar from a LTCS generally heals well, and the likelihood of rupture during labor in a subsequent vaginal delivery is relatively low.

The risk of 0.5% can vary based on specific factors such as maternal characteristics, the indication for the previous cesarean, and the management of labor. However, it remains a consensus figure in the majority of studies and clinical guidelines when evaluating the safety of trial of labor after cesarean (TOLAC).

In contrast, higher percentages mentioned in the other options reflect scenarios that do not accurately align with the data related to LTCS. Thus, the figure of 0.5% encapsulates the expected risk for uterine rupture under the specified conditions accurately.