- 2-4 lbs during first trimester, 1 lb per month.
- 11-14 lbs during the 2nd trimester, 0.9 lb per week.
- 8-11 lbs from the 3rd trimester, 0.5-1 lb per week.
Normal weight gain pattern define maternal-fetal health.
Failure to gain weight is an ominous sign.