Male or Female

My Crested Gecko is a little over a year and a half old now and I still can't quite make out what he/she is. There is a buldge, but it just doesn't look big enough to be male, but flat enough for a female.

Can anyone help? Here is 4 pictures I tried to get.

 

Sorry Cassie, I cant tell, it does look like a buldge but the pics are kind of dark.