 The ten year pregnancy rate is estimated at 6.3 to 24.8 pregnancies per 1000 procedures performed, and the ectopic pregnancy rate is estimated at 17.1 per 1000 procedures performed.This method uses electric current to cauterize the tube, but also allows radiating current to further damage the tubes as it spreads from the coagulation site.The tubes may also be transected after cauterization.