With one of these carriers, you won't have to change your carrier as your baby ages. (abckidsinc.com)
Your upfront price may be more, but you'll be able to change carriers on your phone without waiting until your contract expires. (rismedia.com)
As your child gets older and develops more, you can change the carrier so that you can wear your baby on the front - facing outward instead. (abckidsinc.com)