There should be a rule against using performance enhancing hormonal drugs. Everyone is so concerned about the girl who wants to be a boy that they forgot all about the other girls who just want to compete. 
Having to compete against another girl  using performance enhancers isn't fair to the other female athletes. It's no different than the many Russian athletes that were banned from participation in the olympics due to use of performance enhancing drugs. Beggs winning the Texas state championship will about as meaningful as the last time Lance Armstrong won the Tour De france. 
Mack Beggs created this  situation, it should be her that receives the short end of the stick if anyone is to.