Ronda Rousey is expecting a baby girl. The 37-year-old star recently debuted her growing baby bump at the San Diego Comic-Con, and Ronda has now taken to social media to confirm that she’s expecting a baby girl. The former UFC champion – who has also enjoyed success in the movie business – wrote on Instagram: “IT’S A GIRL! Happy I can finally shout it from the rooftops, but couldn’t resist revealing it at Comicon where I’d coincidentally be exactly as far along (4 months) as my character ‘Mom’ is in my new graphic novel ‘Expecting the Unexpected’ (So technically I finally got to cosplay at Com…