It turns out that today is National Day to Prevent Teen Pregnancy and, to commemorate it, MTV just announced a fourth-season renewal of its docu-series Teen Mom, a spinoff from the hit 16 and Pregnant. Season 3 of Teen Mom will premiere July 5. Additionally, MTV is rolling out a series of new PSAs featuring Teen Mom stars Amber, Catelynn, Farrah and Maci talking candidly about sex, pregnancy and prevention.