Weight gain during pregnancy

Weight gain during pregnancy


Gaining weight during pregnancy is healthy, natural and necessary. However, being either overweight or underweight can put your baby at risk. Find out about what’s considered the healthy amount to gain during pregnancy in order support your baby’s development and give them the best start in life.

Weight gain during pregnancy

Weight gain: what’s recommended

The recommended amount of weight you should gain throughout your pregnancy can be calculated based on your body mass index (BMI).

To determine your BMI, simply divide your weight in kilograms by the square of your height in metres (or divide your weight in pounds by the square of your height in inches and then multiply the result by 703). If you’re unsure, you can use our BMI table below, or speak to your doctor who’ll be able to work it out for you.


Steady and gradual weight gain is best but as every pregnancy and every woman is different, you may gain more during some weeks than others.

Weight loss during pregnancy

Being overweight can mean you’re more at risk of developing high blood pressure, gestational diabetes and premature birth and even increase your risk of complications. However, once you become pregnant, losing weight is not recommended as it can reduce your baby’s birth weight and put them at risk. Dieting can starve you and your baby of the vital nutrients needed to help your baby develop.

A healthy, balanced diet consisting of a wide range of food groups will give your baby the vitamins and minerals they need and prevent you from putting on any unnecessary weight.

Being underweight in pregnancy

If you’re underweight and trying for a baby, putting on weight now will not only help you to have a healthier pregnancy, it can also help you to conceive. If you are already pregnant, your midwife will be able to advise you on the healthiest way to add extra calories and nutrients to your diet to ensure you gain a healthy amount of weight.

If you have any questions about weight gain in pregnancy our team of experienced mums and midwives can help – give them a call on 08457 623 628 between 8am and 8pm Monday to Friday.

7 comments

dagmar orszulikova said...

hi ladies
i am 26 weeks and i have not put any weight yet. feeling well, eating well, all test are good and bump is growing, so i am not worried. your body tells you what you need and when. keep well! xox

8 September 2010 14:23
81shelbay said...

I am 28 weeks pregnant and I weigh 8st 3lb not pregnant i weigh 8st the now so I have lost weight. I try to eat healthy but it would help if my partner went shopping as there is often no food in the house to eat and he has control of all the money as I don't work and he does but he works for himself and not me as long as he is all right who cares eh. (PRAT)

27 August 2010 18:11
Nicole Harvey said...

I am at week 37 and have put on 28lb eek!!, lots of walking for me once little man arrives

27 August 2010 13:05
domini3 said...

I'm in week 21 and i've put on 6kg, all over! Hopefully it'll continue to be gradual and i won't become too huge making it harder to lose after! Clearly i'm not as lucky as these other posts!

20 August 2010 21:13
VictoriaYoungMummyToBe said...

I am 23 weeks now and i havent put any weight on but i am getting a bump!

13 August 2010 20:42
LeahH933 said...

Im now 20weeks pregnant and i haavnt gained any weight during my pregnancy iv just lost weight

6 August 2010 20:23
mammy2be said...

so if i am 25 pound

25 June 2010 16:09

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