If a plant self-pollinates, it'll produces 'feminized seeds', or so the legend goes. I do know that if your plant is stressed it can produce a hermie. My recent crop started to hermie, like all 6 of my ladies were freaking out, but then I realized I had been stressing them with cold water, so I plucked all the male parts off, started heating my water before using, and the problem cleared itself up. I actually pulled and smoked the 7th I had, was the worst affected, and even a month premature and with both sexes it still got me a decent buzz.