What is the definition or description of: ruptured uterus?

Uterine muscle opens: A "ruptured uterus" usually refers to the separation of a previous uterine incision while attempting a vbac (vaginal birth after cesarean). It may also very rarely occur in a normal uterus while inducing labor. It is life-threatening for the mom and the baby. It can result in severe hemorrhaging, infection, need for a hysterectomy and rarely maternal death, lack of oxygen for the baby may occur.

Self explanatory: The uterus can rupture when the muscular wall is weakened. This typically happens in late pregnancy or during labor in people who have predisposing conditions like prior uterine surgery, myomectomy, or prior c-section. It can happen very rarely in people who have never had a prior uterine operation. It is a true obstetrical emergency with substantial risk to the mother and baby.