Weight gain during pregnancy


Weight gain during pregnancy

Your Child gets all nutrients from you. So, to ensure the baby is getting enough, it’s your responsibility to eat enough.

However, eating too much could lead to problems. Proper weight gain during pregnancy is one of the best ways to ensure that Your Child develops fast, happy and healthy.

First Trimester Weight Gain
During the first trimester, most moms-to-be don’t gain much weight. The amount of weight gain during this period varies between 0.5 – 2.5 kg. However, it’s even normal not to gain any weight or lose a little bit during the first trimester due to food aversions or morning sickness.

Second and Third Trimester Weight Gain
Most moms-to-be tend to gain between 4-9 kg by the end of the second trimester. Weight gain is greatest during the third trimester as this is the time that Baby really packs on lots of cute baby fat. So you need to make sure that you’re gaining enough, especially healthy food and not too much sugar. 

How much weight to gain?
The majority of the weight is due to increased blood volume, larger breasts, and water retention, plus there are the baby and the placenta. The amount of weight that you’re supposed to gain depends on your weight and is determined by your Body Mass Index (BMI).

Suggested Weight Gain:
BMI : Healthy weight gain range
Under 18 : 12-18 kg
: 11-16 kg
25-30 : 7-11 kg
30+ : 5-9 kg

Suggested Weight Gain for twins pregnancy:
BMI : Healthy weight gain range
18 – 22 : 17 – 24 kg
23 – 30 : 14 – 22 kg
30+ : 4 – 8 kg

How to calculate your BMI
To calculate your BMI, divide your weight in kilograms by the square of your height in meters: weight in kilograms / [height in meters x height in meters]. For example, if your weight is 50 kg and your height is 1.6 meters, you have to calculate: 50 / [1.6 * 1.6] or 50 / 2.56; the answer is 19.53. That means, if you are 50 kg in weight and 160 cm in height, your BMI is around 19.5, and you should gain between 11-16 kg during your pregnancy. 

If you don’t want to calculate your BMI yourself, you can also use our Weight-Calculator which calculates everything for you. Just make sure that you add your pre-pregnancy weight and height to your Profile

Risks of eating too much
Too much weight gain can mean problems for you as well as the baby. Severely overweight women are more prone to hypertension and gestational diabetes and are more likely to have a cesarean section. Their babies are also usually bigger.


Dr. Wanwadee Sapmee Panyakat (OB-GYN) (14 February 2020)


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