The most dreaded complication of vaginal breech delivery is entrapment of the aftercoming head. When this is due to disproportion, persistent attempts at vaginal extraction are likely to result in a dead or damaged baby. A largely unknown solution in this desperate predicament is to surgically enlarge the pelvis by means of a symphysiotomy. A review of the literature shows that symphysiotomy performed to free the trapped aftercoming head will save at least 80% of babies if the procedure is performed without delay. Every obstetrician should be prepared to perform a symphysiotomy if the aftercoming head is trapped.