We usually define success rates for contraception as the number of women out of 100 who get pregnant in 1 year using that as their only form of contraception.
So by that metric, condoms are 82% effective. Compare that to pull-out (78% effective) and the pill (91% effective). [Source](https://www.acog.org/womens-health/infographics/effectiveness-of-birth-control-methods)
So why the low rate for condoms? Some is the condom breaking, most is putting it on wrong, taking it off wrong , or forgetting to us it completely.
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