Flowering

So I've been in the process of flowering my plants (bag seed) for about .. 2 weeks now and my plants aren't showing any signs of sex yet. I forced them into flowering a little early. I've been keeping them on 12/12. Any tips on how to get them to show sex sooner? I had read that I could keep them in the dark for three days? Has anybody tried this and if so, is it effective? Or should I just wait it out another week? Any suggestions welcome!

Keep them on 12/12, make sure it is pitch black during the dark cycle, give it just one more week and you should be able to tell, and you may be able to now with a good magnifying glass.