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:Eclipse 2018 in pictures: Best photos of the Blood MoonPruitt’s Successor Wants Rollbacks, Too. And He Wants Them to Stick.Dengue fever and Zika virus breakthrough: Britain develops new tool to predict outbreaksNonfiction: On the Front Lines of InfertilityPolar Bear Shot and Killed After Attacking Cruise Ship GuardEclipse 2018: When is the next lunar eclipse over the UK? Blood Moon hidden by clouds