Yea I dunno either, looks kinda like a boy though.

For me I can usually pick out and watch the male fpre-flowers develope. Female pre-flowers usually just pop up out of no where on me. Its a really nice suprise when it happens though. I always have those little green hair looking things right by the nodes, which is like a horrible dick tease. Im like is that a fem. flower.... no its a dick tease

If you havent sex'd it yet just wait for the pistils, like everyone else said. You cannot miss the 2 whit hairs.