AdvertisementIs '16 And Pregnant' An Effective Form Of Birth Control?January 13, 2014facebookEmailEpisode 1 of 16 and Pregnant tells the story of Maci, a "classic overachiever" at her Chattanooga, Tenn., high school. A new study attributes a portion of the decline in the U.S. teen birthrate to the MTV show. (MTV)