What is a key risk associated with the onset of uterine contractions in total placenta previa?

In the case of total placenta previa, where the placenta completely covers the cervix, the onset of uterine contractions poses a significant risk of dilation and placental separation. As contractions begin, they may cause the cervix to dilate, which is especially concerning when the placenta is situated in such a precarious position. Dilation might lead to the detachment of the placenta from the uterine wall, resulting in various complications like severe bleeding, which can be harmful to both the mother and the fetus.

This complication is critical because it places the mother at heightened risk for hemorrhaging during labor, necessitating careful monitoring and often a planned cesarean delivery to ensure the safety of both the mother and child. Understanding this risk is crucial in managing pregnancies complicated by total placenta previa to prevent adverse outcomes. Other options, such as reduced delivery chances, lower maternal blood pressure, or delayed labor progression, do not encapsulate the immediate and severe risks associated with uterine contractions in this specific context.