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Comparison of birth control methods: Different types of birth control methods have large differences in effectiveness, actions required of users, and side effects. Different methods require different actions of users. Barrier methods, spermicides, or coitus interruptus must be used at every act of intercourse. The male condom may not be applied until the penis is erect. Barriers such as diaphragms, caps, the contraceptive sponge, and female condoms may be placed several hours before intercourse begins (note that when using the female condom the penis must be guided into place when initiating intercourse). The female condom should be removed immediately after intercourse, and before arising. The other female barrier methods must be left in place for several hours after sex. Spermicides, depending on the form, may be applied several minutes to an hour before intercourse begins. With IUDs, female or male sterilization, and hormone implant there is "little or nothing to do" post initial procedure; there is nothing to put in place before intercourse to prevent pregnancy〔(【引用サイトリンク】title=Planned Parenthood IUD Birth Control - Mirena IUD - ParaGard IUD )〕 Intrauterine methods require clinic visits for installation and removal or replacement (if desired) only once every several years (5-12), depending on the device. Sterilization is a one-time, permanent procedure - after the success of surgery is verified (for vasectomy), no action is usually required of users. Implants, such as Nexplanon, provide effective birth control for three years without any user action between insertion and removal of the implant. Insertion and removal of the Implant involves a minor surgical procedure. Oral contraceptives require some action every day. Other hormonal methods require less frequent action - weekly for the patch, twice a month for vaginal ring, monthly for combined injectable contraceptive, and every twelve weeks for the injection Depo-Provera. Fertility awareness-based methods require some action every day to monitor and record fertility signs. The lactational amenorrhea method (LAM) requires breast feeding at least every four to six hours. ==User dependence== Different methods require different levels of diligence by users. Methods with little or nothing to do or remember, or that require a clinic visit less than once per year are said to be ''non-user dependent'', ''forgettable'' or ''top-tier'' methods. Intrauterine methods, implants and sterilization fall into this category.〔 For methods that are not user dependent, the actual and perfect-use failure rates are very similar. Many hormonal methods of birth control, and LAM require a moderate level of thoughtfulness. For many hormonal methods, clinic visits must be made every three months to a year to renew the prescription. The pill must be taken every day, the patch must be reapplied weekly, or the ring must be replaced monthly. Injections are required every 12 weeks. The rules for LAM must be followed every day. Both LAM and hormonal methods provide a reduced level of protection against pregnancy if they are occasionally used incorrectly (rarely going longer than 4–6 hours between breastfeeds, a late pill or injection, or forgetting to replace a patch or ring on time). The actual failure rates for LAM and hormonal methods are somewhat higher than the perfect-use failure rates. Higher levels of user commitment are required for other methods. Barrier methods, coitus interruptus, and spermicides must be used at every act of intercourse. Fertility awareness-based methods may require daily tracking of the menstrual cycle. The actual failure rates for these methods may be much higher than the perfect-use failure rates. 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「Comparison of birth control methods」の詳細全文を読む スポンサード リンク
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