why are you wondering?? did u let a male plant jack its self off all over your fems?? or did you get a little trenny??
if you get a jewellers loupe you should be able to see little specs of pollen on a few hairs, go to Advanced Marijuana section then i think theres a sticky in there about producing seeds, im sure they oculd help with your question if not, jsut search it in their, ull find it real quick