Why are condoms only 98% effective?

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I just read that condoms (with perfect usage/no human error) are 98% effective and that 2% fail rate doesn’t have to do with faulty latex. How then? If the latex is blocking all the semen how could it fail unless there was some breakage or some coming out the top?

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Anonymous 0 Comments

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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