Baby's size?

Heather🐻
The doctor said it's fine, so I'm not worried, but when we went and found out we were having a baby boy on Monday (17w5d) Dr. said he was already 8oz! That's 3oz more than the average! Does anyone else think that's HUGE?? Should I be worried he's going to be big? I don't overeat or anything else to cause him to be bigger. I'm just wondering if this has happened to anyone else and if your baby was big when born?