Transcutaneous Electrical Nerve Stimulation (TENS) is the application of pulsed electrical current through surface electrodes placed on the skin for the relief of pain. It works through the “Gate Control Theory” and via the release of endorphins into specific areas of the central nervous system. TENS stimulates the large myelinated nerve fibres thereby closing the “Gate” to pain. It also increases the release of endorphins from the brain. Both these physiological actions reduce the number of nerve impulses reaching the brain, lessening the perception of pain. TENS can therefore provide effective pain relief from the early stages of labour right through to delivery. Reserve your TENS unit when you are 36 weeks (or earlier). Sterile electrodes included.