Glad to be the first one to tell you that you have a "YOUNG LADY" there. There is a "pre-flower" in the first pic, and it is a female pre-flower. I love this part right here. This is where a whole shit load of ppl come in and tell me I'm crazy, or stupid, or I don't know what the fuck I'm talking about. I just sit back and laugh. You have a female there bro. Who's takin' bets? Switch the lights to 12/12, and come back in 3-5 days and tell me what you see. Your plant is growing in the "alternating internode" pattern now, which means SHE is mature, and will render the best weed SHE is capable of rendering. Great job so far!