If the plant has pistils at the top its female. On all cannabis plants there are other little green pistil-"like" grows that shoot out from the internodes but they are not indicative of sex. Plants rarely, if ever, become hermi so early in the flowering process. They turn hermi either due to genetic traits or because the plant is under a LOT of stress. Hermis only become apparent well into the flowering stage. Most hermies develop little yellow banana like pods and they are easy to identify. One strain particularly prone to hermaphroditism is "stella blue." Dont freak out because your plants arent hermi....not yet anyway.... take good care of them and they will take good care of you ;-) Good luck.