Sit up in pushchair

[MrsGEW1]

At what age can you start to lift the seat up slightly from the lying down position so your baby isn't lying flat all the time.
My boy is 15 weeks old and can hold his head up, he's also really fascinated by his surroundings so he'd really enjoy being able to see more instead of laying flat all the time

I'd say now was fine at a slight angle. We had ours in the pushchair bit of the travel system at 3 months (mostly reclined) because she had reflux and wouldn't lie flat. Her head strength was good and she was well supported so I felt happy with it.

I'm pretty sure you'll get some people saying not until they turn 6 months, like something majic happens to make them suddenly ready. Go with your own judgement as long as they are at a low angle and their head is strong / supported.

We did it about 4 months or just after because my our pram carry cot was quite small and DD was long so she basically outgrew it then. And the pushchair part went mostly flat but not completely so it was at a very tiny incline.

Most sit up chair attachments to pram are from 6 months with good reason.....just the same as being in a car seat for long periods - they might be able to hold their heads up for a period of time but 18 weeks is still too young to have developed such strong neck muscles