Everywhere I find on the internet says that condoms, when used properly and don’t break, are only 98% effective.
That means if you have sex once a week you’re just as well off as having no protection once a year.
Are 2% of condoms randomly selected to have holes poked in them?
What’s going on?
In: Biology
Birth control effectiveness rates are not “per use”, they’re defined as the percentage of women who do not become pregnant within the first year of using a birth control method.
So the chance of failure per use is actually much much lower than 2%. As for the reason for that percentage, it comes down to what’s defined as perfect use. Breakage, perforation, etc can be sources of error that aren’t factored into perfect use.
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