IRCT2014121610765N6 IRCT 2016-07-08 Vice chancellor for reaserch, Tabriz University of Medical Scienses Comparison of Continuous Epidural Infusion of Bupivacaine and Fentanyl versus Patient Controlled Analgesia techniques for Labor Analgesia Comparison of severity of pain in continuous Epidural Infusion of Bupivacaine and Fentanyl versus Patient Controlled Analgesia techniques for Labor Analgesia 2015-12-22 anticipated 60 Complete https://irct.ir/trial/11177 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. 2-3 Condition 1: Labor pain. Condition 2: delivery. Intervention 1: Patients of group one (group receiving continued infusion, 30 patients) will receive the blobs dose of solution that contain bupivacaine 0.125 plus fentanil 3µg/ml (total volume of 10 ml) through catheter, and they will receive background infusion ml/h 8 of same solution with infusion pump. Intervention 2: Patients of group two (30 patients)will receive the blobs dose of 10 ml from solution that contain bupivacaine 125 mg (26 ml bupivacaeine 0.5% and 100 µg fentanyl in 100 ml normal saline through catheter. This group has not background infusion, and patient will receive druge with press the button control of pump when need, and anesthesiologist will administer 8 ml of same solution when need to further analgesic.