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Healthy Weight In Pregnancy

Being at a healthy weight during pregnancy reduces the risk of complications.

If you are able to get to a healthy weight before becoming pregnant this is best for you and your baby.

You should not feel embarrassed or judged about your weight.

Health professionals are used to supporting women of all shapes and sizes.

Attending all of your ante-natal appointments is very important to make sure any problems are spotted early and you get the right care for you.

If you are overweight or underweight at your first appointment with your midwife they will be able to give you support and advice about how best to keep you and your baby well in pregnancy.

You may also be referred for specialist support from the hospital maternity team.Healthy weight is assessed using BMI (body mass index) Find out more *here*.

A healthy BMI is between 18.5–25.  

Weight gained in pregnancy is not ‘just baby’ it is also made up of;

  • Placenta
  • Fluid around the baby
  • Extra blood volume
  • Breast size increase.

In the UK there is no fixed advice on how much weight you ‘should’ put on in pregnancy.

Advice about weight gain can be discussed with your midwife taking into account your individual needs.              

  • Being underweight in pregnancy can increase the risk of miscarriage, low birth weight and early delivery (before 37 weeks).

    You may have always been of a low weight and feel well and healthy. Or it may be something new that needs checking out.

    Your midwife will talk to you to get a clear idea about your eating habits, as well as your thoughts and feelings about it.

    Some people have eating disorders that affect their body image and find the body changes in pregnancy particularly hard.

    You may be given advice to help you gain weight in a healthy way. For more information click *here*.

    Your midwife will discuss any extra care you will need during your pregnancy with you.

  • Being overweight in pregnancy increases the risk of miscarriage and stillbirth. It also makes it more likely you will have your baby early.

    Overweight mums to be are more likely to get a type of diabetes that begins in pregnancy (gestational diabetes).

    The risk of pre-eclampsia (find out more *here*) and blood clots is higher if you are overweight.

    You might have less choice about how you give birth – there is a higher chance of caesarean section.

    Your midwifery team will keep a closer eye on you to spot any problems early. They will talk to you and explain how you can minimise these risks.

    Pregnancy is not a time to go on a diet to lose weight; it might make it harder to get all the different vitamins and minerals you and your baby need.

    If you are overweight eating healthily and being active is sensible to keep your weight gain in check. It will help keep the risks from being overweight as low as possible.

    Look at our ‘Eat Well in Pregnancy’ pages.


  • Although partners are not carrying a baby – expecting a baby can be a good time for both parents to think together about healthy eating and having an active lifestyle.

    • This is a great way to support your pregnant partner to keep well in pregnancy.
    • It gets you both on track to be good role models to your baby from the very beginning.

    There is a lot of information and ideas on healthy lifestyles available *here* on JustOneNorfolk.

    Take a look together and plan a healthy start for your family life – small changes can make a big difference.

Who Can Help?

For support or advice young people, families and professionals can contact:

Just One Number for Norfolk Children and Young People’s Health Services Tel: 0300 300 0123 Monday-Friday 9am-5pm Saturday 9am-1pm.

Parents can use Parentline Text messaging service: 07520 631590

Young people aged 11-19 can text Chat Health on 07480635060

Other parents who are going through or have been through this before can be a big help to you, friends or family, or you could join our online forum to speak to Norfolk Parents
click *here* to find out more.

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