Mommies-to-be Part 1: Pregnancy & Weight Gain

As we are heading into the month of Mother’s Day, we thought it would be fitting to write something for the mommies-to-be.

Photo credit: @Rachel Andrews Photography


One of the things most moms worry about is weight gain during pregnancy… but it is a normal part of the journey! It may be frightening for some moms to see the scale climb over the weeks, but try to see it as the way your body is growing to accommodate and nourish your baby, and the way that your baby itself is growing.

There are so many beautiful changes that happen during pregnancy.


  • Your blood volume increases by almost 50% by the end of your pregnancy

  • Less than half of the weight gain comes from the baby, placenta and amniotic fluid

  • Majority of the weight gain comes from breast tissue, uterus, blood and other fluids

  • The amount of fat in the abdomen, back and upper thigh areas gradually increase to serve as an energy reserve for pregnancy and breastfeeding

It isn’t recommended to lose weight during pregnancy, even for moms who are overweight. Instead, there is a recommended healthy amount of weight to gain that is actually based on your pre-pregnancy body mass index (BMI) which looks at your weight and height.

Your healthcare professional will probably weigh you at your antenatal appointments to keep track of your weight gain. The recommendations for weight gain based on pre-pregnancy weights are:

Underweight pre pregnancy: 12.5-18kg total weight gain

Normal pre pregnancy weight: 11.5-16kg total weight gain for a single baby and 17-25kg for twins

Overweight pre pregnancy: 7-11.5kg total weight gain for a single baby and 14-23kg for twins

Obese pre pregnancy: 5-9kg total weight gain for a single baby and 11-19kg for twins

Weight gain can be managed with a suitable way of eating and also maintaining some type of physical activity suitable for you while pregnant. If you have any questions and/or if you’re concerned about your weight gain during pregnancy, you can contact a Registered Dietitian for guidance.

Over the next few weeks we will be sharing some more information regarding pregnancy nutrition for the mommies-to-be, so keep a look out!

-Amber Kelly (Registered Dietitian, South Africa)


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