A childhood belief about giving birth

I was three at the time my sister was born and therefore years later my mother's pregnancy became quite fuzzy to me. In the third grade my teacher started talking about how sometimes doctors have to cut open a mommy's stomach to get the baby out. This combined with distant memories of my mother being in a room with jelly on her stomach (like when you get an ultrasound), I believed that they cut my baby sister out of my mother's stomach and rubbed magic jelly on her so it would heal without stitches...