I have the uppababy vista. My baby was getting very frustrated laying down and so I started using the seat attachment in recline from about 3.5 months. Little one is now 4.5 months and I've just read online that babies should be in the pram until six months. ..I had no idea. I just did what made the baby happy and didn't realise it could cause back problems.
If I go back to using the pram attachment now will it be ok?