I'm 20 weeks and haven't gained a pound yet. Infact, I lost several pounds during the first 3 months due to nausea etc... and haven't gained them back. I also workout everyday and eat very healthy--fish, fruit etc... I'm not overweight to begin with either. I'm sure it will catch up, but doctor hasn't said anything to me thus far. She seems to be Ok with everything when I mention my concerns.