Interesting point, bdasko. I've never been pregnant let alone given birth, so I know very little about the process of lactation. But I can see how the GWF wouldn't be able to track that. I wouldn't think the body has increased movement as a result of lactation, which of course is one of the main things the GWF uses to calculate caloric burn. I'm just taking a guess here, but it seems like the only "GWF detectable" parameter that lactation might affect is body temp, and I have no idea if producing milk increases body temp in the first place.
I rather doubt Leigh's GWF accuracy study included lactating mothers, but I'm still really looking forward to seeing it.
