She could be less than a month pregnant and not know it. The testing doesn't have to be right before the match. Maybe a few days or hours before. Does this kind of testing actually happen?
Yes - they must take a pregnancy test hours before the fight. - this is common rules of all MMA organisations
Well first off all, like most of the professional athletes don't wanna be pregnant and have a kid until they are retired because it dampens there training capabilities. MMA fights also do a lot to make there testosterone high. Mohammed Ali didn't have sex for the 3 months before his fight to make his testosterone very high so no. I don't think they do.