Not exactly sure where to put this, since it’s an infographic, but it’s on the New York Times website, so figured maybe it could go in World News.
It’s an interactive chart about the probabilities of birth control failure, for given periods of use. A lot of people on this forum like to talk about the effectiveness of NFP vs other forms of birth control, so some might find these number fascinating.
If you drag your mouse over the chart, you can see the probability of an unplanned pregnancy given use of a particular type of birth control for 1 year, 2 years, etc., up to 10 years.
Therefore, the numbers on the chart represent the probability that the given birth control method will fail if used for the given time period. They even have different numbers for perfect use vs. typical use.
NFP (ovulation method) had a 96% chance of failure over the course of 10 years with typical use, and a 24% chance of failure over the same period, even when used perfectly.
However, many of the other methods that secular people argue are better than NFP really didn’t fair much better. Male condoms had an 86% chance of failure with typical use. The pill had a 61% chance of failure. Basically, the only methods that almost never failed, even with typical use, were sterilizations and implants (which obviously have a number properties that make them undesirable, even for secular people).