You said..."Hi everyone. Vertigo has been sleeping on and off today. She is sleeping about 50% of the time. I'm wondering if anyone has had a gravid Cham sleep this much or whether it always signifies a problem (i.e., that she is likely eggbound)"...is she sitting low in the cage? Lethargic? Those can be signs of eggbinding. She should not be sleeping during the day.