It says somewhere to use the infant insert for up to 4 months old. I just bought one myself and i do remember reading this - not sure where though but it was definately 4 months.
The insert is really only a padded blanket anyway so depending on the size of your boy you may not need it.
I wouldn't bother. I had one, never used it. Ash was too big for it and my boobs were way too big, there wasn't room for it. I just froggied him until recently, and he is 4 months now (I think from about 3 months he was in it normal with legs out)
Bookmarks