The male will have quite noticable upsidedown V shape preanal pores right above the vent just like leopard geckos. You can see it on the female, too, but you have to really look hard to see them...they are tiny on females; it's very noticable in males, though, and if you run your finger on them on the males, you will feel little bumps; whereas, if you do it to the females, it feels smooth...no bumps.