Its true that Arg B&Ws tend to only breed after hibernation. I'm not saying it can't be done, its just very unlikly. If you want to ask an expert i'd go check out thetegu.com and ask either Varnyard or Rick on the site, they are both long time breeders of tegu and the unoffical experts (and offical) of all things tegu.
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Leo Gex
1.0 Giants
0.1 Red strip/hypo
1.0 Patternless
0.2 Normals
Others:
1.0 Giant plated lizard
1.0 Blue Tegu
1.1 dogs
2:0 chinchillas