My friend showed very early and was quite large early in her pregnancy. Her baby was attached at the front of her uterus thus everything popped out.

I think is has more to do with how tight your abdominal muscles are. I worked out a lot before getting pregnant and I didn't show at all until 19 weeks. And even then I just looked fatter but not pregnant - I don't think I looked obviously pregnant until 25 weeks. Not having a colon meant that my baby and uterus sat farther back in my pelvis because there was more room, and my OB sent me for a growth ultrasound later on because my belly measured and felt smaller than other women.

Is it possible that your body is still clearing out the medications from your IVF cycle? I have heard that those cause major bloating and water retention... perhaps that is part of what it going on.

I do think it depends on the person and their build. My ab muscles have always been a bit poochy since the surgery but I've worked to try to keep them strong underneath, and I too didn't start showing until about 20 weeks. Everyone is different.

My experience was actually more like Kate1026, where I looked smaller than most women and showed later. Without my colon, there was just more room in my abdominal cavity so the baby sat back further. Typically women show much earlier and look bigger with their second or third babies so if this is not your first, that's pretty normal.

I think it just depends on your build, where the baby sits, etc. I am a more petite person. Short and thinner so I was suprised to be wearing maternity jeans about 14 weeks and now at 16 I am "showing" to where people are already rubbing my belly! My doctor says in shorter smaller woman it is harder to hide

Are you having a singleton? I realize this is october now and i just saw your post. I had IVF but it was twins and i was in maternity jeans at 7 weeks and everyone thought i was 3-4 mos along. Congrats!

Now I definitely look pregnant, at 5 and a half months!

Having a singleton, but I think the issue is poor abdominal muscle tone. Also, I am inexplicably not gaining any weight so I think any belly growth looks extra pronounced.