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Intrauterine device (IUD) with progestogen is a hormonal intrauterine device classified as a long-acting reversible contraceptive method. It is one of the most effective forms of birth control. In the United Kingdom (UK), the IUD with progestogen is referred to as an intrauterine system (IUS) or intrauterine contraceptive (IUC). This article will refer to these devices as the hormonal IUD to distinguish from IUD with copper. Mirena is one brand available in the United States and UK. It is on the World Health Organization's List of Essential Medicines, the most important medication needed in a basic health system. ==Medical uses== In addition to birth control, hormonal IUD are used for prevention and treatment of: * heavy menstrual periods *Endometriosis and chronic pelvic pain〔 *Adenomyosis and dysmenorrhea〔 * Anemia *In some cases, use of a hormonal IUD may prevent a need for a hysterectomy. Advantages *Considered one of the most effective forms of reversible birth control〔 *Can be used while breastfeeding〔 (see also nursing mothers) *No preparations needed before sex,〔(【引用サイトリンク】url=http://www.plannedparenthood.org/learn/birth-control/iud )〕 though routine checking of the device strings by patient and physician is advised to ensure proper placement remains intact〔(【引用サイトリンク】url=http://hcp.mirena-us.com/lets-talk-about-mirena/convenience.php )〕 *Ability to become pregnant returns within 24 months for approximately 90% of users〔(【引用サイトリンク】url=http://www.rexall.ca/articles/view/1655/Mirena )〕 *May experience lighter periods (some women stop having periods completely, see also amenorrhea) *Effective for up to three to five years (depending on the IUD) Disadvantages *Irregular periods and spotting between periods often occurs after insertion〔 *Mild to moderate discomfort experienced during insertion procedure, including cramping or backache *Other potential adverse effects and risks 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IUD with progestogen」の詳細全文を読む スポンサード リンク
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