Women didn't fight in the UFC until February 2013, and the promotion's president had publicly ruled it out only two years earlier. Ronda Rousey's signing in November 2012 reversed that stance overnight, and within five years the UFC had built out three full women's divisions from a standing start. The path from zero to three divisions ran through one blunt refusal, one fast reversal, and a series of new weight classes built almost entirely from outside talent.
Dana White said it would never happen
In January 2011, UFC president Dana White was asked on camera when women would fight in the UFC. His answer was one word: "Never." At the time, the UFC was still working to get cage fighting itself accepted by mainstream sports media and athletic commissions, and White has since said he saw adding women as a separate, harder fight he didn't want yet.
That position held for less than two years. The UFC's 2011 acquisition of Strikeforce, a rival promotion that already ran a women's bantamweight division, put White in regular contact with the woman who would change his mind.
Rousey's signing made her champion before she'd had a UFC fight
In November 2012, the UFC signed Ronda Rousey, the reigning Strikeforce bantamweight champion and a former Olympic judo bronze medalist. White didn't just add her to the roster — he named her the UFC's first-ever women's champion on the spot, awarding her the inaugural women's bantamweight title before she had competed inside the UFC's own cage even once.
That decision turned Rousey's UFC debut into a title defense rather than a title eliminator, and it made the launch of the entire division dependent on one fighter's drawing power. It worked: Rousey became the promotion's biggest star of the mid-2010s and, years later, its first female Hall of Fame inductee.
The first fight: Rousey vs. Carmouche
The first women's fight in UFC history happened at UFC 157 on February 23, 2013, at the Honda Center in Anaheim, California. Rousey defended her bantamweight title against Liz Carmouche, a former Marine, and won by first-round armbar submission.
The fight drew serious mainstream coverage for a UFC card, in large part because it was a genuine first rather than a novelty undercard bout. It also set the tone for how the division would be built for the next several years: around a small handful of the sport's biggest personalities rather than a deep, settled roster.
Bantamweight changed hands fast once it got moving
Rousey's title reign didn't last as long as her early dominance suggested it might. Holly Holm knocked her out in the second round at UFC 193 in November 2015, ending a long unbeaten run in the sport's most-watched women's fight to that point. Miesha Tate then submitted Holm at UFC 196 in March 2016, and Amanda Nunes submitted Tate just four months later at UFC 200 in July 2016.
Three title changes in under a year is unusual for any division, and it showed the depth of the bantamweight class had grown well past its founding star. Nunes went on to become the first fighter to hold two UFC women's titles at once, adding the featherweight belt in December 2018 with a 51-second knockout of Cris Cyborg at UFC 232.
Strawweight: built from outside the UFC almost overnight
The UFC didn't grow its second women's division organically. In late 2013, it signed eleven fighters directly from Invicta FC, at the time the leading all-women's promotion, to populate a new 115-pound strawweight division. Those fighters filled an all-female season of The Ultimate Fighter, the UFC's competition-and-reality format, with the winner crowned the division's first champion.
Carla Esparza beat Rose Namajunas at the finale in December 2014 to become the first UFC women's strawweight champion. The division has since become one of the deepest in women's MMA, but it started as a complete transplant from a smaller promotion rather than a slow build from UFC-only talent.
Flyweight filled the gap between the other two
A third division, women's flyweight at 125 pounds, arrived in 2017 to sit between bantamweight and strawweight. The UFC again used an all-female Ultimate Fighter tournament to crown its first champion, and Nicco Montaño won it, becoming the inaugural women's flyweight champion at the finale in December 2017.
The division's early going was rockier than the other two — its first champion held the title only a matter of months before losing it — and it took longer to develop the kind of star power bantamweight and strawweight had from day one. It has since become a stable three-division backbone alongside the other two weight classes.
A fourth division came and mostly went
The UFC also created a women's featherweight division, debuting in February 2017 with Germaine de Randamie as its first champion. Cris Cyborg won the vacant title later that year, and Nunes ended Cyborg's reign in 2018 to become a two-division champion. But the weight class never built a roster deep enough to support regular title defenses, and it has sat largely inactive since, without the ongoing schedule of contenders the other three divisions maintain.
That pattern — a division rising or fading based on whether enough fighters and depth exist to sustain it — is the real story of women's UFC. Bantamweight, strawweight, and flyweight survived because deep, competitive fields formed underneath the first champions; featherweight didn't get there. Reading any women's weight class today, or the broader history of the promotion it grew out of, means recognizing that women's MMA in the UFC wasn't a steady expansion — it was a reversal in 2012 followed by uneven growth, division by division, ever since.