I have a group of very young blue spinys that were 08 hatchlings. I have on really small one that seems like a female. She has never been quite as colorful as the bigger ones that seem like males. They are still so small that I didn't think I could sex them at this point.

Today I noticed that she has bubble belly! At what age are spinys mature enough to be sexually active? At what age can a female become gravid? She can't even be 4 months old!