Whose baby isn't crawling, walking or climbing stairs at 9 months? I am part of an online group of mamas of babies born in Sept/Oct 2010. Some came a bit early so I'd say the oldest baby is 10 months with the youngest being about 7 1/2 months. I'm exaggerating a teeny bit but seriously - every baby is moving and shaking!
The most Little Miss moves around is to lean forward to reach a toy, or fall backwards and bang her head. that's it. Now don't get me wrong - I am really okay with waiting for that mobility, especially because it means that I will get more cardio in trying to chase her, track her and keep her safe! Right now she is a bit like a Chia pet - I put her somewhere and she is still there a few minutes later. Although she still has way less hair than a Chia pet!
When my Kiddo was a baby, I can remember telling my mom that it seemed like he was never going to crawl. Ever. Of course this was way back in the olden days before we had a computer and I had never even heard of the internet (weird eh?) but the one parenting book I had indicated that he ought to have been starting to crawl. My mother would tell me, "Be careful what you wish for, once they start moving they don't stop!"
Sure enough, it took him until about 10 months to scoot around on his bum using his feet and one hand, and until over 11 months to fully crawl. He then promptly walked a week or so later. I know she'll likely crawl eventually, or just go straight to walking.
Crawling is no longer even used as a milestone for babies because it is considered unnecessary. Tell that to Little Miss when she's 18 years old and needs to crawl home from a party. It comes in *pretty* handy.
For now I will just keep plopping her down and enjoying her immobility. Soon enough it'll be a gated community in my house!