It's too ealry to tell. And if you can get more light in there, try to. It looks a little stretched out, more light should controll the stretching and fatten it up.... But the plant looks small/young, to young to even start showing signs of sex....Some plants take a couple months up to 4-6 months to show sign of sex....Or just vegg it a little longer in 18+ hours of light per day, and then when you switch the light to 12/12, wait about 2 - 3 weeks and you should be able to tell then. hope this helps man