Is propping up ur baby in sitting position bad for a 4 month old's delicate back bone? R u not supposed to do that..? How many of u let the baby be lying down and wait for them to sit up on their own instead of propping them up ?

P.S: I'm also told that carrying baby in a baby wearing carrier or sling or wrap where the most pressure is on their bum/tail bone is not a good idea.

What's ur take mommas ?