I'm not sure if I'm the one to ask because I've had very limited success so far.
I live in FL and my tegus are kept outside (which I believe makes the whole copulation thing easier to achieve.) I cycle my tegus during the winter and usually observe copulation several times in early April. She layed her eggs in late May.
I got around 38 eggs in 2004 and about 35 this year. I lost all of the eggs in 2004 and all but 8 this year. Most of them looked fertile when they were first layed but I think my female waited too long to lay because she wasn't happy with the nesting sites I provided. Next year, I'm going to provide her with all the materials to build her own. I actually observed some really cool nesting behavior this year. After she became frustrated with my nesting sites, she actually took materials from different nesting sites and pushed them into her burrow with her front legs to create her own. I believe that I wouldn't have lost so many eggs if she hadn't waited so long to lay. (She seemed very uncomfortable for a few days before she finally constructed a nesting site that she was happy with.)
I incubated the eggs at 84F in a Natures Spirit incubator w/ a Helix thermostat. Like I said, I'm definitely still learning with these guys but I'm very happy to have had even limited successs.
Chris

