The Intrauterine System, or IUS as it is also known, is a small, soft plastic device containing the hormone progestogen. It is inserted into the womb, and if you choose to use this method of contraception, then a doctor or nurse will insert it for you - it takes about five minutes.
The IUS works by releasing a small dose of progestogen on a daily basis. It prevents pregnancy by thickening the cervical muscles at the womb entrance. This makes it difficult for the sperm to get through. At the same time, it thins the lining of the womb, which prevents eggs from being implanted. In some cases, ovulation is stopped totally.
The IUS is suitable for those wanting long-term contraception, preventing worry about pregnancy on a daily basis. The intrauterine system, once inserted, can stay in place for up to five years. It can however, be removed at any time by your doctor or a nurse. After removal of the IUS, fertility returns immediately.
This device might suit you if you are estrogen-intolerable. Also, as it does not affect breast milk, it can be used quite safely while breastfeeding. It has a very high reliability rate, and can be used at any age.
Additional benefits that could be experienced are the improvement of heavy and painful periods, as well as protection against cancer of the lining of the womb. In some cases, women have reduced bleeding or none at all, which in turn, reduces the risk of becoming anemic.
During the first three months after insertion, there is a possibility that you may experience headaches, nausea, breast tenderness, and irregular bleeding, but this does settle down after a while.