Great news!!!
UFC's most dominant couple -- Amanda Nunes and Nina Ansaroff -- have announced Nina's pregnant and due in Sept!!!!
"I wanna tell every single person on this planet that Raegan Ann Nunes will be here mid September," Amanda said on IG ... "I cannot wait to see her."
Nina -- the UFC's #5 ranked strawweight fighter -- added, "I am carrying and still plan on fighter after she is born."
The two have been together for years -- and when they came to the TMZ office back in December, they already had big baby plans!