Me and my sister used to think that when babies were born, they came out through the anus, and I believed for quite a while that all the babies a mom would have just waited in the stomach, each sleeping on a bunk bed carved into the mom's stomach skin, and they would just kind of slowly roll off the bunk bed every so often, and the moms stomach would grow until she went to a doctor and the doctor would pull the baby out.
So me and my sister would lay on the stairs, pretending to be babies in the mom's stomach, having adventures in "Stomachworld" until the doctor would come and take us.
A childhood belief about giving birth

others believed things like this
- When I was very little I used to believe that when babies were born they came out of the mother's stomach.— Aerith
- I used to think that women had a secret door on their stomach that babies opened when they were bornAnon
- i used to belive that babies came from the stomachAnon
- I used to believe that babies came out through the mother's belly and they sewed up the stomach afterwards.— Lucy
- when i was young i used to think babies just poped out like a little pistle and the doctor caught itAnon
- I thought a stomach ache was a stomach egg— Catherine