I used to think that, when a female ovulated, if the egg stuck to the inside of the uterus, she got pregnant, and if it didn't, she had a period. Obviously, they missed a key point when they taught us about women's bodies in school!
A childhood belief about getting pregnant

others believed things like this
- I used to believe there was nothing inside our bodies when I was about 4.— Connie
- When I was little, I use to think if you missed a day of school, you would be arrested.— Kaity
- I used to believe that you had to be on your period to get pregnant........— Tricia
- I used to believe that if you went swimming after you got your first period, then you could get pregnant. — Mel
- I used to believe (about 9) that a penis was a sausage that men stuck in their crutch area to attract women.— Feebs.
- I used to believe that women got pregnant just by kissing. — Lisa