Why is there an increase in energy and nutrient requirements during pregnancy?

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First answer by Yulia Crowder. Last edit by Yulia Crowder.
Energy and nutrient requirements increase during pregnancy because of the following factors:

* Growth of maternal, foetal and placental tissue
* Fat reserves created in the mother which will be used later during lactation

A woman will find that on an average her energy needs will go up to around 150kcal a day in the first trimester and in up to 350 kcal/day in the second or third trimester. Reference: Dietary Fats and Health, by E G Perkins, W J Visek, Pg 279

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