Strikeforce, the UFC announced they would be adding female fighters to their roster for the first time in the promotion's history. Initially, only the women's bantamweight division was brought over, with the division's premiere bout taking place at UFC 157. A little over a year later, the UFC announced they would be expanding their weight classes for female fighters with the addition of a women's strawweight division, the first bout took place at UFC Fight Night: Cowboy vs. Miller. In late 2016, a featherweight division was introduced for the women with the first bout to be for the inaugural championship at UFC 208 on February 11, 2017. In that same year the UFC announced the Women's Flyweight division would officially be added, with the winner of the 26th season of The Ultimate Fighter to be named the inaugural champion. Current champions Men Women Men's championship history Heavyweight Championship 206 to 265 lb (93 to 120 kg) The UFC Superfight Championship was unified with the UFC 11 Tournament Championship to determine the inaugural UFC Heavyweight Champion on February 7, 1997, when Mark Coleman defeated Dan Severn at UFC 12. Light Heavyweight Championship 186 to 205 lb (84 to 93 kg) The Light Heavyweight Championship was known as the Middleweight Championship prior to UFC 31 (May 4, 2001). The Pride World Middleweight Championship (205.03 lb) was unified with the UFC Light Heavyweight Championship on September 8, 2007, when Quinton Jackson defeated Dan Henderson at UFC 75. Middleweight Championship 171 to 185 lb (78 to 84 kg) The Pride World Welterweight Championship (182.98 lb) was unified with the UFC Middleweight Championship on March 1, 2008, when Anderson Silva defeated Dan Henderson at UFC 82. Welterweight Championship 156 to 170 lb (71 to 77 kg) The Welterweight Championship was known as the Lightweight Championship prior to UFC 31 (May 4, 2001). Lightweight Championship 146 to 155 lb (66 to 70 kg) The Lightweight Championship was known as the Bantamweight Championship prior to UFC 31 (May 4, 2001). The Strikeforce Lightweight Championship was unified (perhaps unofficially) with the UFC Lightweight Championship on April 20, 2013, when Benson Henderson defeated Gilbert Melendez at UFC on Fox: Henderson vs. Melendez. Featherweight Championship 136 to 145 lb (61 to 66 kg) Prior to the UFC-WEC merger, José Aldo was the WEC Featherweight Champion. Aldo was awarded the inaugural UFC Featherweight Championship on November 20, 2010, at UFC 123