Best Answer - Chosen by Voters No it doesn't. The way you carry the baby (more to the front or to the back) the babies position and how much weight you gain as well as how much fluid you have determines the size of your belly. Not the actual size of the baby. Some women barely show and have very large babies, some women have HUGE bellies and have tiny babies. Other Answers (7) With my first I was big every where. I gained about 45 lbs and my belly measured large the whole time. My daughter ended up being 8 lbs 14 oz. With my second, my belly was much smaller, I only gained 10 lbs my whole pregnancy. I measured small the whole time and my doc and I just knew my son will be smaller...well he came out 9 lbs 1 oz. So you just never know. Good Luck! Source(s): i have a relatively smaller belly than most women. my doctor always tells me this every week when he measures me. but i have gestational diabetes and am at risk for a big baby. the doctor is expecting a 9 pound plus baby. but my belly is not that big. i think it just depends on the womans body. some women dont get that big, and the next pregnancy they get huge or vice versa. Source(s): Usually yes it does. As we all know you are only pregnant for 40 weeks. So at my 38 week check