You can buy car seats that can be kept rear facing for a while and then when you're ready (when baby is the right weight and age obviously) you can turn the car seat round and it will last until they are much older. This means the seats are much bigger for baby so they wont be all squished but still rear facing for safety.
Im buying one (britax do them) and keeping LO rear facing until shes at least a year and a half thn just turning her around.
9mths / 9kg but yes - they should be able to sit up as the seat is obviously an upright unlike the baby carrier.
the reason they need to be able to sit up is actually to do with muscle development in the neck and back, babies who cannot sit up would suffer much more damage in comparison with a baby who was more developed in the event of a collision, not even a collision, an emergency stop is enought to throw the bay forward
9 kgs/9 months for forward facing but you are not suppose to switch if your LO is 9 kgs but not 9 months, or 9 months but not 9 kgs. If you can get an extended rear facing carseat it's much better than forward facing. Some are suitable from birth. xx
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