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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.
This was a “typical use” failure rate, including user failure to use the method correctly. [12] In comparison, the combined oral contraceptive pill has an actual use failure rate of 2–8%, [13] while intrauterine devices (IUDs) have an actual use failure rate of 0.1–0.8%. [14] Condoms have an actual use failure rate of 10–18%. [9]
The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method. It is a very approximate measure of the number of unintended pregnancies in 100 woman-years of exposure that is simple to calculate, but has a number of methodological deficiencies.
The SERM ormeloxifene is less effective than the steroid hormone methods; studies have found a perfect-use failure rate near 2% per year. [11] [12] Long-acting methods such as the implant and the IUS are user-independent methods. [13] For user-independent methods, the typical or actual-use failure rates are the same as the method failure rates ...
The T-shaped models with a surface area of 380 mm 2 of copper have the lowest failure rates. The TCu 380A (ParaGard) has a one-year failure rate of 0.8% and a cumulative 12-year failure rate of 2.2%. [11] Over 12 years of use, the models with less surface area of copper have higher failure rates. The TCu 220A has a 12-year failure rate of 5.8%.
Failure rates with the copper IUD is about 0.8% while the levonorgestrel IUD has a failure rates of 0.2% in the first year of use. [64] Among types of birth control, they, along with birth control implants, result in the greatest satisfaction among users. [ 65 ]
The 2024 election has raised a lot of questions about the future of reproductive rights in the United States. While abortion is a hot conversation topic, concerns about birth control are also on ...
The diaphragm is a barrier method of birth control. [3] It is moderately effective, with a one-year failure rate of around 12% with typical use. [4] It is placed over the cervix with spermicide before sex and left in place for at least six hours after sex. [5] [6] Fitting by a healthcare provider is generally required. [5] Side effects are ...