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==Effectiveness==
The table below color codes the '''typical
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Some methods may be used simultaneously for higher effectiveness rates. For example, using condoms with spermicides the estimated perfect use failure rate would be comparable to the perfect use failure rate of the implant.<ref name="Hatcher20th" /> However, mathematically combining the rates to estimate the effectiveness of combined methods can be inaccurate, as the effectiveness of each method is not necessarily independent, except in the perfect case.<ref>{{cite journal | vauthors = Kestelman P, Trussell J | title = Efficacy of the simultaneous use of condoms and spermicides | journal = Family Planning Perspectives | volume = 23 | issue = 5 | pages = 226–7, 232 | year = 1991 | pmid = 1743276 | doi = 10.2307/2135759 | jstor = 2135759 }}</ref>
If a method is known or suspected to have been ineffective, such as a condom breaking, or a method could not be used, as is the case for [[rape]] when user action is required for every act of intercourse, [[emergency contraception]] (ECP) may be taken up to 72 to 120 hours after [[sexual intercourse]]. Emergency contraception should be taken shortly before or as soon after intercourse as possible, as its efficacy decreases with increasing delay. Although ECP is considered an emergency measure, levonorgestrel ECP taken shortly before sex may be used as a primary method for
before making major changes to the table (e.g. adding or removing methods). -->
This table lists the [[force of mortality|rate of pregnancy]] during the first year of use.<!--
User action required - frequency action is required to employ the method.
Sorting - larger is less frequent.
Roughly YY.MDH (Y - # years, M - months, D - days, H hours)
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