Hi,

I haven't done paediatrics for a long time, but I'm a physio, and from memory, the skills you've described her being unable to do (eg, take weight through her legs when held) are what you'd expect as a minimum at 9 months. Does she get much 'tummy time,' ie, time lying on her tummy where she gets to practise holding her head up in that position? Babies who are not regularly placed in that position often are a bit slower to crawl, though it wouldn't explain the weight through legs. Do you have her propped up in a seat, or a bouncinette, much of the time? Are her toys loose, or always close and within easy reach of her? If she's not free to move around, she won't have had the opportunity to learn the skills of balancing, getting in and out of sitting, leaning through her arms to reach something , which is a precursor of crawling, etc. Re 'being stubborn', you can rule that out by using a toy she wants to play with. What does she do if she's sitting, and you put a toy she wants just barely, or a bit further, out of reach, either forwards or to the side of her? If you leave her lying on her back with toys out of reach, can she roll to tummy and back over to her back?

From what you described, I would be a little concerned at this stage, though I don't know what the standard approach to get help would be where you are. I would guess that either your child health nurse or GP could refer her to a ppaediatric develomental centre, where she could be assessed and you can start helping her development with specific activities. Treatment sooner rather than later, if there is a mild developmental delay, often leads to a resolution of the issues much more easily, so it's definitely better to get her checked.