Take a Number: Nearly Half of Teens Have Had Sex by Age 19, Survey Finds Sexual activity declined among adolescents in the 1990s, and rates have remained low. Still, teenagers in the United States are more likely to become pregnant than those in other western countries. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:SpaceX Tesla Roadster mapped: Starman’s upcoming key milestonesThinking of this number 'could cause a BLACK HOLE to form in your brain'SpaceX launch LIVE stream: Watch Elon Musk's Starlink Falcon 9 launch online HEREDinosaur bones that could be five MILLION years old handed into charity shopSpaceX Starman: Tesla Roadster's current position in deep space tracked liveSpaceX TRACKER: Where is Tesla Roadster now? Follow Elon Musk's Starman LIVE