Panther Cham. Question

I bought a baby nosy-be panther chameleon a few weeks back and it's doing great - it's always fun raising them from the get-go. I don't really have that much experience with panther chameleons, well babies at least, so my question is how long until you can determine the sex? This guy/girl is probably a month old or so now, and I imagine I've a ways to go but I'm just looking for an estimation so I know when to start expecting it. It's showing blotches of blue on it's side and some on the head and all, but I don't want to get my hopes up on it being a male or anything lol

My baby panther chameleon started showing his colors when he was around 3 months old. He's a red barred ambilobe. As you probably know, the females will develop very little coloring, and will carry neutral colors like green, brown and grey, and the males are the ones who have the brilliant coloring. It really amazed me at how fast the males complete their coloring too. Here's my guy chester at a little under a year old.
http://i141.photobucket.com/albums/r...Picture212.jpg