Developmental Delays

My little guy just turned 10 months old. He will occasionally put pressure on his legs but not often and can't sit up unassisted yet and doesn't crawl. I should add that we our being followed by his doctor and just started therapy. He's also going for an MRI next week. 
He was born a month early and was healthy at birth but I did have placenta problems as well and I'm not sure if that has to do with his delays. 
I'm just wondering if anyone else has had a baby that has been a late sitter and eventually caught up? 
Picture of my happy guy below! 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors