How to increase fetus weight?

Healthy diet.: Human fetal growth relies on many factors, most of which are not modifiable (e.g. Genetic material, placental function). Some others are, namely healthy diet, avoidance of smoking cigarettes and euglycemia. The curve attached shows how the human fetus grows exponentially near the end of the pregnancy - so another thing you can do to help your fetus grow is to avoid stress and reach your due date.