Thanks, Tartan!
This fabric has been around for at least 10 years, I think. I purchased a few yards of it recently at a yard sale (just in time for this project). It is a Dreamspinners V.I.P. Crantson Printworks fabric.
The baby will be a girl, so the heart fabric for the backing seemed like a good choice. The polka dot is a border, not part of the panel.