The chances of a self pollinated hermaphrodite seed being an intersex plant are at least three out of four, and probably higher. Sex isn't X and Y in plants. They don't have that. It's more chemical. If you're dilligent about killing off all the herms (3 out of 4 or more), as well as low yielders, weaklings, and males (can happen) you might end up with one or two thick and juicy stable female mothers out of about fifty or sixty seeds. Even then they may still be weak to trigger male flowers after all of that work. Might be easier to just order superior genetics that aren't trying to sabotage you, you know? Also, if you've been running this plant for several generations, have you been using the strongest clone as your next mom? If not, the hormonal balance may have degraded with time and all your future generations are going to do this as well. Colorado's close to you. Come get some medical!