Information alert

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Glucose_challenge_test_1.png In week 28 of your pregnancy, we will ask you to take a Glucose Challenge Test
Glucose_challenge_test_2.png Glucose Challenge Test finds out if you are at risk of developing gestational diabetes – this is diabetes which starts during pregnancy
Glucose_challenge_test_3.png There is a higher chance of getting gestational diabetes if you are overweight and or, you had it (or pre-diabetes) in earlier pregnancies – if so, you will do a different test
Glucose_challenge_test_4.png The test finds out if you have too much sugar (known as glucose) in your blood
Glucose_challenge_test_5.png This can happen when you are pregnant because your body cannot make enough of the insulin that normally controls your blood sugar
Glucose_challenge_test_6.png Gestational diabetes is rare – out of 100 women, only 2 to 5 will have it
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Risks

It’s important that we find out if you have gestational diabetes

Glucose_challenge_test_8.png This is because if it is left untreated, there are risks to you and to the baby
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These risks include

  • giving birth early
  • the baby being too large
  • still birth
  • and jaundice in the baby
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There is a risk to you of developing pre-eclampsia – this is a life-threatening condition which is also a risk to your baby

Glucose_challenge_test_11.png We can treat gestational diabetes - simple changes in lifestyle are usually enough to control it for most women
Glucose_challenge_test_12.png Where these changes are not enough, we can give you tablets or injections
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Taking the Glucose Challenge Test

  • knock on the door of the blood test room
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  • we will give you a glucose drink – you can add water to it if you like
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  • make a note of the time you have your drink – you will need to have a blood test 1 hour after your drink
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  • do not eat, drink or chew gum during this hour
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  • sit quietly in the waiting area
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  • you can go to the toilet during this time if you need to
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  • 5 minutes before the hour is up, knock on the door of the blood test room again
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  • give your hospital number to the staff in the blood test room
Glucose_challenge_test_21.png We will test your iron and blood antibodies at the same time as we test for glucose levels
Glucose_challenge_test_22.png If your results are normal, you will get the results at your next midwife appointment
Glucose_challenge_test_23.png If your results are higher than we like to see, we will arrange for you to have another test called a Glucose Tolerance Test (GTT) – your midwife will explain your results and arrange the appointment
Glucose_challenge_test_24.png The midwife may also contact you through the UCLH MyCare app
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Maternal Foetal Assessment Unit (MFAU)

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We are an emergency service for women more than 14 weeks pregnant

Glucose_challenge_test_27.png We are open all year round, 24 hours a day
Glucose_challenge_test_28.png You will find us in the Elizabeth Garrett Anderson (EGA) building on level 1
Glucose_challenge_test_29.png You can call us on 020 34 47 94 00
(press option 2 when asked)
Glucose_challenge_test_30.png If you can’t call, just come in

Page last updated: 04 September 2025

Review due: 01 September 2027