Invicta FC 27: Kaufman vs. Kianzad was a mixed martial arts event headlined by veteran Sarah Kaufman returning to Invicta against Pannie Kianzad. On December 6, Invicta announced Kaufman had been signed to return for a headline bout. A strawweight bout between Mallory Martin and Tiffany Masters was made after being originally scheduled for Invicta FC 24.

Invicta Phoenix Series was a mixed-martial arts event featuring the first in a new series of tournaments produced by Invicta FC for each weight division. The Phoenix Series features a one-night tournament format in which the quarter-final and semi-final bouts are one-round contests, and the tournament final is a three-round bout. Tournament participants are matched up by random draw. Reserve bouts for the tournament are one-round contests, and are classified as exhibitions. Bonuses are awarded for each finish, and the fighter with the fastest finish in the quarterfinals may choose their opponent for the next round from among the other semi-finalists.

Invicta FC 12: Kankaanpää vs. Souza was a mixed martial-arts event headlined by Katja Kankaanpää defending her strawweight championship against Livia Renata Souza. Sijara Eubanks was scheduled to fight Roma Pawelek but Pawlek pulled out due to injury the week of the event and was replaced by Gina Begley. A fight between Cassie Rodish and Stephanie Skinner was originally scheduled but Skinner suffered an injury on the week of the show and the fight was pulled from the event.

Katja Kankaanpaa "Killer Bunny" (70%) 19-8 (30%) DeAnna Bennett "The Argentine Assassin" Tonya Evinger "Triple Threat" (73%) 19-7 (27%) Pannie Kianzad Rachael Ostovich (23%) 5-17 (77%) Andrea Lee "KGB" Roxanne Modafferi "The Happy Warrior" (56%) 10-8 (44%) Mariana Morais Jinh Yu (59%) 10-7 (41%) Liz McCarthy "Lightning" Aspen Ladd (63%) 10-6 (38%) Amanda Bobby Cooper Cindy Dandois (36%) 5-9 (64%) Megan Anderson Jamie Moyle (58%) 7-5 (42%) Sharon Jacobsen JJ Aldrich (78%) 7-2 (22%) Daniela Kortmann Rachel Wiley (43%) 3-4 (57%) Felicia Spencer

Invicta FC 25: Kunitskaya vs. Pa'aluhi was a mixed martial arts event headlined by a fight between Yana Kunitskaya and Raquel Pa'aluhi for the vacated bantamweight championship. The co-main event was originally scheduled to be Lívia Renata Souza facing Jodie Esquibel for the vacated strawweight championship but Esquibel pulled out due to injury. Esquibel was replaced by Janaisa Morandin and the fight was then changed to a non-title bout. Amberlynn Orr was set to face Kelly McGill-Velasco but Kelly accepted a fight with the UFC and was replaced by newcomer Sarah Kleczka. Yaya Rincón was set to face Stephanie Egger but Egger withdrew and was replaced by Courtney King.

Invicta FC 33: Frey vs Grusander II was a mixed martial arts event headlined by a rematch between Jinh Yu Frey and Minna Grusander for the Invicta FC Atomweight Championship.[2]. The two previously headlined Invicta 30 in July where Frey won the championship in a closely contested decision victory. Chantel Coates will meet Ashlynn Kleinbeck in a bout originally scheduled for Invicta FC 31 and that fight will again be planned to air on both Facebook and UFC Fight Pass. Sharon Jacobson was scheduled to fight Kanako Murata but Murata pulled out the week before the event and was replaced by Kay Hansen. At the weigh-ins, Jamie Moyle weighed in at 9 pounds over the strawweight limit and was fined 25% of her purse.