Moving baby from infant seat stroller to the toddler seat stroller?
After a bit of research the consensus is that you should wait until your baby can sit up on his own before putting him in a stroller that forces him to sit up. This is because the spine isn’t developed enough for the baby to sit for longer than a few minutes. However, if you have a seat that reclines AND has a harness that you can strap him in then it is safe. Typically around three months of age the baby has enough control of his neck to move to this type of stroller.