wow thats a lot of calories! sure doesnt feel like Im expending that much breastfeeding :) my son is about 2.5 months- I've only had access to scale once in the past month, and before then I wasnt really keeping track, so I dont know yet how quickly Im loosing (or if I am at all!). The next time I have access to scale Ill get a better idea. Right now Im eating about 1700-2100 cals... Ill see how many cals Spark recommends for 1/2lbs a week then add about 400-500 to either end. Thanks Becky!