I don't use my sling all the time, probably once a week or so (for off road walks etc), and my ginormous 16 month old weighs just over 30lb.
We've been TTC number 2, and I've just (probably) had a MC. DP is all worried because I had DS in the sling the other day. I didn't really think it would affect anything in the very early stages as everything's below the pelvic bone, but should I avoid using the sling from whenever I fall pregnant? Obviously can't avoid having to pick DS up occasionally (he doesn't walk yet, lazy bugger).
Did other people use slings in the early days of PG? I probably won't want to once I've got a bump (have never mastered back carries), but until then...