Boys or girls, it does not matter, a traumatic injury has the possiblility of happening. All you can do is all you can do.. Plyo's, agilities, orthotics, VMO, hams, flexability, game sims. Ive heard it all on this thread, ,,, from hormones, Q-angle, narrow notch, weakness,,, etc. It may not happen to you or your athlete, but it will happen. Those it does not happen to are lucky. If it happens, deal with it. Part of the game. All of the above are things you can do to prevent and we all know the old saying. An ounce of prevention....... Just because of the possiblity, that should not decrease participation at all. What don't kill you makes you stronger right. SO, lets continue to prepare these young ladies as best as possible, discourage the thought of injury, surgery, or whatever. Sounds like there needs to be more intelligence from the coaching staff. Strength coaches (((((other than just PE teachers))))) are a big help to programs that suffer several injuries, HOWEVER, Athletic Trainers SEEM to have a better grasp on not only strengthening, but the proper way to do it, as well as ways to decrease stress on certain body parts. If you dont have a trainer, not sure where ot go from there. They seem to specialize in the mechanics of athletics. There is only so much you can do. IF you brace or pad the kid too much, they will look like the kid in "Christmas Story" and not be able to put their arms down.
A Lot of good info has been stated on this tread, but like I said before, There is not a lot you can do to outright prevent it.