TeenMom230.jpgMTV is renewing Teen Mom for a fourth season, the network announced Wednesday.

Appropriately (or maybe ironically...) Wednesday was the National Day to Prevent Teen Pregnancy.

Season 3 begins July 5 at 10 p.m. and will follow the Season 1 moms - Amber Portwood, Catelynn Lowell, Farrah Abraham and Maci Bookout.

The network hasn't said who will appear in Season 4.

Teen Mom, which averaged 3.8 million viewers in its second season, was the second-highest rated cable show in the 12-34 demo last year, behind MTV'sThe Jersey Shore.

See a weird way that Teen Mom is affecting baby culture nationwide after the jump ... it surprised even us!