eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-12-22 13 4 2325 2329 10.13005/bbra/2401 17389 article Maryam Maktabi 1 Afsaneh Nouruzi 2 Zahra Farzinnia 1 Alireza Kamali 2 Department of Gynecology, Arak University of Medical Sciences, Arak, Iran. Department of Anesthesiology, Arak University of Medical Sciences, Arak Iran. The uterine contractions remain constant a few hours after delivery. Various studies have pointed to the fact that uterine contractions are quite similar to those contractions that result in child delivery. Various medical methods are used to sedate the pain. As TENS is a non-invasive method with no side effect, we seek to study it here in this paper. This is a clinical trial research conducted on 120 women aging 18 to 40 without any particular background disease with any parity who had a natural delivery in Taleghani Center. All the participants were chosen through a random selection procedure. In one group, TENS was placed on both sides of the back and around T10 to L1 and S2 to S4 half an hour, 1 hour and 6 hours after operation. The information correlated with two hours after delivery, while using TENS (the first and the sixth hour) and 6 hours after delivery was measured and recorded. The results showed no statistically significant difference between the average age of participants in the control and case groups. The average scale of pain within the first hour following the operation showed no statistically significant difference. However, the average scale of pain in the 2^nd, 6^th, and 12^th hour following the operation exhibited a statistically significant difference between the two groups (P-value < 0.05). Considering the great advantages of TENS such as its safety and no side effects and toxicity, non-invasiveness and its simplicity, we may recommend TENS as an effective method to reduce natural delivery induced pain. https://www.biotech-asia.org/vol13no4/studying-the-influence-of-transcutaneous-electrical-nerve-stimulation-tens-on-reducing-the-post-natural-delivery-pain-during-breastfeeding-period/ Electrical Stimulation; Pain; Natural delivery