That sounds really low to me, assuming she's eating consistently.

my girl is a 3/07 hatchling, and she weighs about 700g. she weighed under 300g when i got her in september of 07. she eats every 5 days, one appropriately sized prey item (1 weaned rat).

have you had her checked for parasites? what are you feeding her? (fuzzies, pinkies, hoppers, and is it rats or mice?)