You gotta check the stem, every place theres a node, a preflower should come out. 2 white hairs for fem and 2 balls for male.
When preflower shows, the plant still streches a lot, then u can see how the internode distance starts to reduce and more white hairs are coming out in every node and every end of branch, finally buds start getting in shape.
Looks nice! Good luck 👌