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Long-acting reversible contraceptives (LARC) are methods of birth control that provide effective contraception for an extended period without requiring user action. They include injections, intrauterine devices (IUDs) and subdermal contraceptive implants. They are the most effective reversible methods of contraception because they do not depend on patient compliance. So their 'typical use' failure rates, at less than 1% per year, are about the same as 'perfect use' failure rates. In addition to being long-lasting, convenient, and well liked by users, they are very cost effective.〔 Typically, LARC users can save thousands of dollars over a five-year period compared to the use of condoms and birth control pills. Despite their safety and effectiveness LARCs are underutilized: only 15.5% of women worldwide use IUDs, and only 3.4% use subdermal implants.〔 Long-acting reversible contraception is recommended for adolescents〔 to help decrease the teen pregnancy rate. LARCs are recommended for women of any age no matter how many times they have given birth. Women considering using LARCs should obtain contraceptive counseling from reproductive health professionals because those who do are more satisfied with them and use them for longer periods of time.〔 ==Methods== Available LARC methods include IUDs and the subdermal implant: * Hormonal intrauterine device (Mirena - also known as IUC or IUS) * Nonhormonal intrauterine device with copper (US - ParaGard) * Subdermal contraceptive implant (US - Nexplanon/Implanon/Implanon NXT; internationally - Norplant/Jadelle) Some shorter-acting methods are sometimes considered LARC: * Depot medroxyprogesterone acetate injection (DMPA; US - Depo Provera shot) * Combined injectable contraceptive 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「Long-acting reversible contraception」の詳細全文を読む スポンサード リンク
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