nah.. my plants were just about 10 inches when they showed their sex.. n only pure sativa can take a while to show sex, actually indica, or hybrid thats higher indica than sativa, can show pistils rather soon, my pistils just shot out one day, n i knew exactly that it was female, don't cut anything when u dont know for sure, once u see a pollen sac, u will know its a pollen sac, some people think they r buds, but they r dumb, pistils show waaaaaaayyyy earlier than any buds.. pistils r basically budsites, where the bud will start growing, if u see some lil round things its male white hair female like i said before, u will know indefinately when u see either of themm.... search around for pics of males n females that r still in veg, u will see a ridiculous difference.. don't cut off anything either, not worth it, males u kill them n make oil or just chuck em..