|Classification and external resources| Uterine rupture is a
potentially catastrophic event during childbirth by which the
integrity of the myometrial wall is breached. In an incomplete
rupture the peritoneum is still intact. With a complete rupture
the contents of the uterus may spill into the peritoneal cavity
or the broad ligament. A uterine rupture is a life-threatening
event for mother and baby. A uterine rupture typically occurs
during early labor, but may already develop during late
pregnancy. A uterine scar from a previous cesarean section is
the most common risk factor. Other forms of uterine surgery that
result in full-thickness incisions (such as a myomectomy),
dysfunctional labor, labor augmentation by oxytocin or
prostaglandins, and high parity may also set the stage for
uterine rupture. In 2006, an extremely rare case of uterine
rupture in a first pregnancy with no risk factors was reported.
Symptoms of a rupture may be initially quite subtle. An old
cesarean scar may undergo dehiscence, but wit