With all 3 of mine, all the weight was the baby!
It looked like I had a ball under my shirt. With my first, I never owned a stitch of maternity clothing! I did with the others, though. I actually thought my first would be smaller than 7 lbs. so I was surprised by her weight. With my 2nd, I just knew she would be huge because I was in constant pain, lol. I felt like she was going to literally fall out any second from 6 months on. With my 3rd, I wasn't in as much pain, but I figured his weight might be between the others, and he ended up weighing the most. I could just tell he was big.
Usually your instincts are right. My sister felt like she would have a small baby and hers ended up weighing 5 lbs.
Rest In Peace, Laci & Connor.
May God Embrace Your Souls & Bring Your Family Peace.