How many deaths have occurred as a result of MMA?
An MMA Fighter works for the promotion with whom he has signed a contract to fight. There are many MMA promotions in the world and they each have dozens of fighters contracted to fight with them. The ultimate fighting championships (UFC) is the most popular MMA promotion in the world and is considered the place where the worlds best MMA fighters compete in.
Yes. I don't know of any MMA gym that prohibits women from participating. There are some women's professional and amateur MMA fights around the country, although they are relatively rare. Perhaps most notably, EliteXC, the MMA league aired on ShoTime, has women's MMA. Just adding on to the first guy, Shelby Marxx is a very famous WMMA star, she has many championships if I remember right.