Is my cresty male or female?

[leopardboy193]

I have had my crested gecko for about 4 months now and when I got it, it had a slight bulge at the bade of the tail. Ever since then I thought it was a male. Since tonight I've been doubting its a male. The bulge has not grown. Its probably about 9 months now or more. I can't really tell and want some help from an experienced cresty breeder. Heres some pics. (sorry about the blurry one, I wanted to get close and take a pic and I zoomed it and it blurred the pic.)

 

[dragonlvr64]

You will need to get a shot of the underside of his belly, by his tail. You will need a macro setting on your camera to keep it in focus.
What is the weight of your gecko, that may help as well.

 

[lance]

hard to tell without seeing the bottom but if I had to guess from what I see I'd say a female due to the fact I don't see the side bulge.

lance