Currently, epidural analgesia is considered the most used method for pain management during labor, but this technique could have side effects. There are non-pharmacological methods that can be used alternatively or in synergy with epidural analgesia, without adverse effects on maternal and fetal outcomes. These methods include transcutaneous electrical nerve stimulation (TENS). TENS is a physiotherapy technique particularly suitable for the dilation period, during the first state of labor, and while women do not perceive a very intense pain. The use in childbirth is recent and controversial. Despite being well received by women and midwives, their effectiveness has not been clearly demonstrated. Organizations such as the Spanish Society of Gynaecology and Obstetrics and the Department of Health, consider this therapy an inefficient non-pharmacological mechanism for pain relief in the active stage of labor. Women should have the option to choose any pain relief method in any stage of their process. Health professionals are the responsible to know, investigate and work with these different methods, offering to pregnant women, adequate information, which must be based on scientific evidence.