Weight gain during pregnancy: How much weight should I be gaining?

Pregnancy weight gain

The amount of weight gain in pregnancy depends on your body mass index (BMI) before you get pregnant. BMI is a measure of body fat based on your height and weight.

Your doctor will use a pregnancy weight gain chart and your pre-pregnancy BMI to figure out how much weight you need to gain during pregnancy. It usually works out like this:

Pregnancy weight gain chart

  • If you were at a healthy weight before pregnancy, you want to gain about 11-16 kgs during pregnancy. You gain 1 to 2½ kgs in the first trimester and then about ½ kg a week in the second and third trimesters.
  • If you were underweight, you want to gain about 12-18 kgs during pregnancy. You gain 1 to 2 kgs in the first trimester and then a little more than ½ kg a week in the second and third trimesters.
  • If you were overweight before pregnancy, you want to gain about 11-15 kgs during pregnancy. You gain 1 to 2½ kgs in the first trimester and then a little more than a ½ kg every 2 weeks in the second and third trimesters.

This changes if you are having twins. You obviously have to gain more weight than if you were carrying a singleton. Your practitioner would be able to give you guidelines based on your body type.

Putting on weight slowly and steadily is best. Don’t fret if you end up gaining a little more or a little less than the recommended weight gain every week. Even you can experience a “growth spurt” where you gain a lot of weight one week and it evens out the next. It’s ok not to gain too much weight in pregnancy if you were overweight to begin with. But it’s a terrible idea to try to lose weight when you’re pregnant. If you’re worried about your weight gain, talk to your doctor. Use our tracker to see if your weight gain is on track

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