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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]
[52] [53] Success rates for ART are improving yet vary significantly and are particularly dependent on age. [50] For instance, for women younger than 35 the average success rate of ART in 2015 was 31% compared to 16% for those aged 38–40, and 3% for those over 44 years of age. [50]
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The birth rates for Hispanic and African-American teens were more than double those of European-American teens, [9] while Asian-American adolescents have the lowest pregnancy and birth rates of all. [3] As of 2015, New Mexico, Texas, Oklahoma, Arkansas, Louisiana, and Mississippi had the highest adolescent birth rates in the Union. (See map.)
The publication noted that the U.S. fertility rate has been below 2.1 for several decades. In 2021, the rate was 1.64 per person. By 2100, it will drop to 1.45.
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Many states have specific legislation mandating public state universities to implement this curriculum, such as California and New York. With 30.3% of high school graduates not going onto university, lack of consent standards in high school classrooms leaves a sizable portion of young adults never receiving a formal education on the topic. [111]