Teen Mom (renamed Teen Mom OG, starting with the fifth season) is an American reality television series broadcast by MTV. It is the first spin-off of 16 and Pregnant, and it focuses on the lives of several young mothers as they navigate motherhood and strained family and romantic relationships. Its first run consists of four seasons originally aired between December 8, 2009, and October 9, 2012, while another four seasons have aired during its second run that began on March 23, 2015. Season 9 premiered on January 26, 2021.