It hasn’t been very long since women have been taken seriously in the male-dominated world of professional fighting. But now, Mackenzie Dern is trying to take it to a different level. She doesn’t want to simply become a champ, she wants to be “Mom Champ.” Dern, 28, is the No. 5-ranked contender in the world in the strawweight division (115 pounds) in the Ultimate Fighting Championship (UFC). She’s also mom to Moa, her 2-year-old daughter and one of her biggest fans. Winning the title would make Dern the first biological mother to win a UFC belt. “It definitely inspires me, and it’s why I feel I’m a way better fighter now, more mature, and more focused than before my daughter was born,” said Dern, who lives in Huntington Beach with husband and pro surfer Wesley Santos and trains at RVCA Training Center in Costa Mesa under head coach Jason Parillo. …