Windex007 is right; breastfeeding is how many new moms lose the excess pregnancy weight. But it is a delicate dance trying to keep your milk production up. Also, personally I was starving all the time while I was nursing, plus sleep deprivation, so for some of us the whole “losing the baby weight” doesn’t really work as well as we’d like.
Any time you’re in caloric deficit your body will start burning fat (and muscle) stores, so yeah.
I don’t know enough about lactation, but I suspect if you stay in a deficit too long you’ll just stop lactating.
In form of a lack of additional fresh nutrients, or old fat to burn?
Windex007 is right; breastfeeding is how many new moms lose the excess pregnancy weight. But it is a delicate dance trying to keep your milk production up. Also, personally I was starving all the time while I was nursing, plus sleep deprivation, so for some of us the whole “losing the baby weight” doesn’t really work as well as we’d like.