That sounds about right.The upside down heart symbolizes deep love.
vpnavy and reanm8er are both right on cropping the "leg" out part. I can't comment on the other theories as I've never heard that about the heart shape...learning things too here!
I have to admit, the baby looks mighty still!

Death photos were very popular back then and the newly deceased were posed as if still alive.
It could be the child is dead.