A vaginal pessary is a device placed into the vagina used to displace the weight of the uterus away from the cervix. This changes the angle of the cervix in relation to the uterus and can help protect from infection.
There are a variety of pessaries available, including ones made of rubber, plastic, or silicone-based material. They also come in a variety of sizes and your physician will fit the pessary in a position to prevent discomfort within your pelvic organs.
There are very few negative side effects of vaginal pessaries which include minor discomfort and vaginal discharge. While the use of a pessary can be effective for prolonging pregnancy, it is not recommended to be used instead of a cervical cerclage, unless it is too late in the pregnancy to place a cerclage.