My nearly 9 month old is still unable to sit without support.. She can pull herself up to a sitting position when we hold her. She rolls back to front, smiles, babbles and is eating well.. But just seems a little weaker than other babies, she can push of her legs but doesn’t do this very often or for very long. When we put her in a sitting position she will either chuck herself backwards or push off her legs and slide down onto her back. Any advice much appreciated?? Haven’t had the best experience of health visitors so don’t really want to contact them if it’s just a case of her doing things in her own time. She was born at 37 weeks and has ears measured on the small side. Thanks in advance for any help ❤️