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The failure rate of fertility awareness varies widely depending on the system used to identify fertile days, the instructional method, and the population being studied. Some studies have found actual failure rates of 25% per year or higher.
A woman whose menstrual cycles ranged in length from 30 to 36 days would be estimated to be infertile for the first 11 days of her cycle (30-19=11), to be fertile on days 12–25, and to resume infertility on day 26 (36-10=26). When used to avoid pregnancy, such fertility awareness-based methods have a typical-use failure rate of 25% per year. [18]
The failure rate of a copper IUD is approximately 0.8% and can prevent pregnancy for up to 10 years. The hormonal IUD (also known as levonorgestrel intrauterine system or LNg IUD) releases a small amount of the hormone called progestin that can prevent pregnancy for 3–8 years with a failure rate of 0.1-0.4%. [1]
In 2022, UNICEF reported that from 2000 to 2022, "the global adolescent birth rate for the age group 10–14 has declined by over 50 percent, from 3.3 to 1.6 per 1,000 adolescent girls aged 10–14", and "for the age group 15–19 has declined by over 30 percent, from 65 to 43 births per 1,000 adolescent girls aged 15–19". [18]
In 2016, adolescent birth rates between the ages of 15-19 was 45 per 1000. [19] In 2014, 1 in 3 experienced sexual violence , and there more than 1.2 million deaths. The top three leading causes of death in females between the ages of 15-19 are maternal conditions 10.1%, self-harm 9.6%, and road conditions 6.1%.
For avoiding pregnancy, the perfect-use failure rate of Creighton was 0.5%, which means that for each year that 1,000 couples using this method perfectly, that there are 5 unintended pregnancies. The typical-use failure rate, representing the fraction of couples using this method that actually had an unintended pregnancy, is reported as 3.2% ...
Adolescent fertility correlates strongly with poverty in African nations. The highest rate of teenage pregnancy in the world—143 per 1,000 girls aged 15–19 years—is in sub-Saharan Africa. [4] Women in Africa, in general, get married at a much younger age than women elsewhere—leading to earlier pregnancies.
LARC failure rates are comparable to those of sterilization. [15] LARCs and sterilization differ in their reversibility. The implant has a 0.05% failure rate in the first year of use, the levonorgestrel (hormonal) IUD has a 0.1% failure rate in the first year of use, and the copper IUD has a 0.8% failure rate in first year of use. [6] These ...