It's also an excellent way to relieve pain by those suffering from Endometriosis & fibroids who don't want to rely on medication. Discreet & easy to use, The Ova Plus Period Pain Reliever uses special electrode patches to transmit a safe, small electric current through the body to help relieve pain. It can be used anywhere on & around the abdomen & is suitable to be used to relieve back pain. How Does Ova Plus Period Pain Reliever Work? The Ova Plus uses a proven medical therapy known as TENS (Transcutaneous Nerve Stimulation) that prevent messages of pain being sent to the brain & increases the level of endorphins, meaning you feel less pain. The small electrical current is delivered through electrodes to the body effectively & safely. It also helps to relax contracted muscles which greatly relieve period pain. You should not use a TENS machine if you have epilepsy, have an abnormal heart rhythm, have a pacemaker fitted or used before 37 weeks of pregnancy. If you are unsure whether Ova Plus is right for you, consult your doctor before use. Always read the instructions provided.