What does it mean when the statistics say that condoms are, at best, 98% effective.
It sounds like 1/50 times a condom is used, it won’t prevent pregnancy. But this doesn’t seem right because those stats wouldn’t be worth the risk.
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Effectiveness statistics are not per use. In the 95% statistic given, this means that five couples out of one hundred will have a pregnancy during a year even if they use condoms perfectly.
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