The high success rate of vaginal birth after cesarean section (VBAC) and its low association with complications has led to VBACs being attempted at all types of facilities, including birth centers. It must be kept in mind that unpredictable uterine rupture can occur and that uterine rupture necessitates emergency intervention. The only reported predictable feature of fetal heart rate patterns in response to uterine rupture is the sudden onset of fetal bradycardia. Fetal patterns are presented to illustrate this finding.