you asked... How Does the Doctor Estimate Baby’s Weight? Will the doctor estimate my baby's weight before the birth? How? Want to participate? Log in to share your thoughts Re: Will the doctor estimate my baby's weight before the birth? How? Your OB may or may not venture a ballpark guess of baby’s size. If she does throw out a number, don’t expect it to be spot on. It’s just a guesstimate, based on how big your uterus feels, how you’re measuring, and your own stature. That said, many moms report being surprised by their doc's accurate guess!Plus, more from The Bump:Fundal Height?Is Having a Big Baby Hereditary?Will Baby Be Too Big for a Vaginal Delivery? Excerpted from The Baby Bump: 100s of Secrets to Surviving Those Nine Long Months Want to participate? Log in to share your thoughts