The history of birth control

Published On: Apr 09 2013 04:28:22 PM CDT   Updated On: May 07 2015 09:12:34 AM CDT

May is National Teen Pregnancy Prevention month -- Check out some of the important moments in birth control history.

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iStock / Synergee

1920s -- Scientists working independently in Japan and Austria devise the "Rhythm Method" of birth control after figuring out that women are fertile approximately midway through the average menstrual cycle. They conclude pregnancy can be avoided by abstaining from sex during that period.

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