UFC women's bantamweight champion Kayla Harrison had a fiery response to Ronda Rousey's viral press conference rant about her.

Ronda Rousey has hit back at critics who have questioned her age before her first MMA bout in 10 years against Gina Carano, saying: "It's not like my ovaries are fighting."

Rousey pointed to 38-year-old former UFC champion Jon Jones, who last fought 17 months ago, as an example where the same principles are not applied.