The 4 season of 16 and Pregnant was broadcast on MTV from mardi 27 mars 2012 to mardi 29 mai 2012. It consists of 12 episodes, the first one is called "Mackenzie" and the last one "Kristina".
Pregnant teenage girls in high school dealing with the hardships of teenage pregnancy. Each episode features a different teenage girl, with the episode typically beginning when she is 4 to 8 months into her pregnancy.