If you have gestational diabetes, the chances of having problems with the pregnancy can be reduced by controlling your blood sugar (glucose) levels.
You'll also need to be more closely monitored during pregnancy and labour to check if treatment is working and for any problems.
You can find apps and tools to help you manage your diabetes in the NHS Apps Library.
You'll be given a testing kit that you can use to check your blood sugar level.
This involves using a finger-pricking device and putting a drop of blood on a testing strip.
You'll be advised:
Diabetes UK has more information about monitoring your glucose levels.
Making changes to your diet can help control your blood sugar levels.
You should be referred to a dietitian, who can give you advice about your diet and how to plan healthy meals.
You may be advised to:
It's also important to be aware of foods to avoid during pregnancy, such as certain types of fish and cheese.
Diabetes UK has more information about diet and lifestyle with gestational diabetes.
Physical activity lowers your blood glucose level, so regular exercise can be an effective way to manage gestational diabetes.
You'll be advised about safe ways to exercise during pregnancy. Find out more about exercise in pregnancy.
A common recommendation is to aim for at least 150 minutes (2 hours and 30 minutes) of moderate-intensity activity a week, plus strength exercises on 2 or more days a week.
You may be given medicine if your blood sugar levels are still not well controlled 1 to 2 weeks after changing your diet and exercising regularly, or if your blood sugar level is very high. This may be tablets – usually metformin – or insulin injections.
Your blood sugar levels can increase as your pregnancy progresses, so even if they are well controlled at first, you may need to take medicine later in pregnancy.
You can usually stop taking these medicines after you give birth.
Metformin is taken as a tablet up to 3 times a day, usually with or after meals.
Side effects of metformin can include:
Occasionally a different tablet called glibenclamide may be prescribed.
Insulin may be recommended if:
Insulin is taken as an injection, which you'll be shown how to do yourself. Depending on the type of insulin you're prescribed, you may need to inject yourself before meals, at bedtime, or on waking.
You will be told how much insulin to take. Blood sugar levels usually increase as pregnancy progresses, so your insulin dose may need to be increased over time.
If this happens, you should test your blood sugar – treat it straight away if it's low. Find out how to treat low blood sugar.
You'll be given information about hypoglycaemia if you're prescribed insulin.
Gestational diabetes can increase the risk of your baby developing problems, such as growing larger than usual.
Because of this, you'll be offered extra antenatal appointments so your baby can be monitored.
Appointments you should be offered include:
The ideal time to give birth if you have gestational diabetes is usually around weeks 38 to 40.
If your blood sugar is within normal levels and there are no concerns about your or your baby's health, you may be able to wait for labour to start naturally.
Earlier delivery may be recommended if there are concerns about your or your baby's health, or if your blood sugar levels have not been well controlled.
You should give birth at a hospital where specially trained health care professionals are available to provide appropriate care for your baby.
When you go into hospital to give birth, take your blood sugar testing kit with you, plus any medicines you're taking.
Usually you should keep testing your blood sugar and taking your medicines until you're in established labour or you're told to stop eating before a caesarean section.
During labour and delivery, your blood sugar will be monitored and kept under control. You may need to have insulin given to you through a drip, to control your blood sugar levels.
You can usually see, hold and feed your baby soon after you've given birth. It's important to feed your baby as soon as possible after birth (within 30 minutes) and then at frequent intervals (every 2-3 hours) until your baby's blood sugar levels are stable.
Your baby's blood sugar level will be tested starting 2 to 4 hours after birth. If it's low, your baby may need to be temporarily fed through a tube or a drip.
If your baby is unwell or needs close monitoring, they may be looked after in a specialist neonatal unit.
Any medicines you were taking to control your blood sugar will usually be stopped after you give birth. You'll usually be advised to keep checking your blood sugar for 1 or 2 days after you give birth.
If you're both well, you and your baby will normally be able to go home after 24 hours.
You should have a blood test to check for diabetes 6 to 13 weeks after giving birth. This is because a small number of women with gestational diabetes continue to have raised blood sugar after pregnancy.
If the result is normal, you'll usually be advised to have an annual test for diabetes. This is because you're at an increased risk of developing type 2 diabetes – a lifelong type of diabetes – if you've had gestational diabetes.