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The numbers behind 鈥渘atural鈥� birth control
Videos on TikTok have been claiming that so-called 鈥渘atural鈥� birth control methods can be 99% effective. We examine what we really know, and how we know it.
Podcast
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More or Less: Behind the Stats
Tim Harford and the More or Less team try to make sense of the statistics around us.
