Where do babies come from?

Miss A's current favorite book is the Merck Manual of Medical Information. She was thumbing through it this afternoon while we were doing her homework (read: parent work). She found a picture of a baby being born and asked "is that what it looks like when the baby comes out of your mouth?". What? She said the picture looked like a mouth. So I asked her where she thought babies came out of and she said "your butt". She was shocked to learn that is the not the exit either!