Transcutaneous electrical nerve stimulation (TENS) is an analgesic method used to reduce labor pains during the first stage of labor. A systematic review and meta-analysis of 51 randomized controlled trials with a total of 10,038 participants found that women using TENS may experience greater pain relief compared to a blind control (by 1.98 cm on a pain scale). TENS can shorten the duration of the first stage of labor by approximately 46 minutes compared to control and 62 minutes compared to epidural analgesia. Compared to epidural analgesia, the differences in analgesic efficacy and adverse effects were very small. The study did not identify safety issues associated with the use of TENS during labor. The research was based on data available until 22 July 2025 and included only randomized controlled trials with a high level of evidence.