Hi Laura, I wonder if maybe you don't want to rethink taking a poll on something that concerns you.
The only reason I say this, is because if the number goes in the wrong direction, it would likely cause you even more concern.
The one thing I have learned from this site, is to be careful about comparing and realize that each baby is different; and at the same time I have learned that where there is a legitimate concern and Mommy doubts, you should talk to your doctor and certainly not go by polls or references since again, every baby is different.
Talk to your doctor......that first step will help eliminate alot of your worries. After that, a poll to see when babies sit up won't botther you, but just in fact be a comparison for you.
Did any of that make sense? And in the meantime, {hugs}, welcome to worrying about all these milestones. I just realized I should have kept quiet about wanting mine to talk! :wink: