Intrauterine pessaries, also known as intrauterine contraceptive coils, are small T-shaped plastic devices with a copper band around the cross arms that are inserted into the uterus to prevent pregnancy. IUDs are one of the most popular contraceptive methods, especially for long-term reversible contraception, because they can be easily inserted and removed. As a contraceptive method, IUDs have a number of advantages: They are a very effective method of contraception, with a 98-99% success rate for five years of use; They can be used by almost any woman; Their effect lasts for ten years if they are not removed; They begin to act immediately after insertion; They are independent of sexual activity; They do not interfere with intercourse; They are suitable for lactating women; Fertility returns immediately when the IUD is removed; The action of the intrauterine device is not affected by oral medication; It does not increase the risk of certain types of malignant diseases, as is the case with hormonal contraceptives; Does not cause weight gain; It usually does not affect mood or sexual desire. Intrauterine pessaries are the second most popular form of reversible birth control after birth control pills. Globally, about 23% of women who use contraception choose IUDs. Of course, there are cases in which the use of IUDs is contraindicated. Such conditions can be: Pregnancy; Active sexually transmitted infection; If the patient has cervical cancer or uterine cancer; With unexplained vaginal bleeding; It is not recommended to use copper IUDs in the presence of an allergy to copper or Wilson’s disease (a genetic condition that causes the accumulation of copper in the body). It is not recommended to use hormonal IUDs in the presence of severe liver disease or breast cancer. It is recommended to choose another method of contraception in women who are at high risk of developing breast cancer. The use of intrauterine contraception can negatively affect the menstrual cycle. Copper IUDs can worsen menstrual cramps and increase menstrual bleeding, especially in the first few months after insertion. Hormonal IUDs can cause irregular periods, especially in the first few months after insertion. Most women who use IUDs continue to ovulate, or release an egg, every month during their menstrual cycle. Intrauterine pessaries are considered both safe and effective. Complications – although rare – may include: Perforation. The uterine wall may be punctured during insertion. High-risk pregnancy. The chances of getting pregnant are small. If it does occur, the pregnancy will be considered more likely to result in complications. Infection.Bacteria can enter the body when the IUD is inserted. Infections are most likely to occur within the first 20 days of insertion in this case. References: 1. Cortessis VK, Barrett M, Brown Wade N, et al. Intrauterine device use and cervical cancer risk: a systematic review and meta-analysis. (https://pubmed.ncbi.nlm.nih.gov/29112647/)Obstet Gynecol 2. Kavanaugh ML, Jerman J. Contraceptive method use in the United States: trends and characteristics between 2008, 2012 and 2014. (https:/ /pubmed.ncbi.nlm.nih.gov/29038071/) Contraception. 3. Soini T, Hurskainen R, Grénman S, Mäenpää J, Paavonen J, Pukkala E. Cancer risk in women using the levonorgestrel-releasing intrauterine system in Finland. (https://pubmed.ncbi.nlm.nih.gov/25004338/) Obstet Gynecol.