How can I avoid gaining too much weight with pregnancy?

You have to gain . Weight while you are pregnant. The idea is not to gain too much more than the recommended by following good eating habits. Baby: 7-8 pounds placenta: 1-2 pounds amniotic fluid: 2 pounds uterus: 2 pounds maternal breast tissue: 2 pounds maternal blood : 4 pounds fluids in maternal tissue: 4 pounds maternal fat and nutrient stores: 7 pounds.