I dont see any pistils. You didnt give a good idea of how big/developed the plant is overall from the pics but you should probably start seeing preflowers soon. They show up when a plant is mature regardless of the light cycle its under. Alternating nodes show up when a plant is mature too, i usually wait till i see them and then start looking for preflowers. Note- female Preflowers do not always form correctly at first so you should not chop a plant based off preflowers.(a large majority of the time they are correct but its better safe than sorry, ive had plants i was sure were male surprise me before and i know im not the only one it occasionally happens too) if you think youve got a male on your hands based off the preflowers put it into 12/12 first to confirm it, since it is mature and ready to flower it wont be long till you can tell for sure.