from what i know its mostly the conditiond durring germ and how the seeds came to be that govern your chances of getting females, seeds that come from most indoor grows are femmed seeds, the reason being that people dont leave males in grow rooms on pourpouse, they get polinated by plants that have been somehow stressed and have turned hermie on the growers. if you smoke great weed then your chances are good to get females. other than that i hear best female to male ratio for germ is right about 72-76 f. but again this has not been proven or at least not by me, for some strange reason ive never actually seen a male plant and i grow all random bagseed.