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Weight Gain During Pregnancy

Weight gain during pregnancy varies from woman-to-woman and depends on body type and severity of nausea and vomiting. Average weight gain for women is between 25 to 35 pounds, although slight deviations from this may also be considered normal.

Total weight gain at the end of pregnancy is, in most instances, approximated as follows, according to the March of Dimes:


7.5 pounds

maternal energy stores
(fat, protein, and other nutrients)

7 pounds

fluid volume

4 pounds

breast enlargement

2 pounds


2 pounds

amniotic fluid

2 pounds


1.5 pounds

Average weight gain per trimester:

first trimester

3 to 4 pounds

second trimester

12 to 14 pounds

third trimester

8 to 10 pounds

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