Any woman can develop gestational diabetes during pregnancy, but you're at an increased risk if:
If any of these apply to you, you should be offered screening for gestational diabetes during your pregnancy.
- your body mass index (BMI) is above 30 – use the healthy weight calculator to work out your BMI
- you previously had a baby who weighed 4.5kg (10lbs) or more at birth
- you had gestational diabetes in a previous pregnancy
- one of your parents or siblings has diabetes
- your family origins are south Asian, Chinese, African-Caribbean or Middle Eastern
Most women with gestational diabetes have otherwise normal pregnancies with healthy babies.However, gestational diabetes can cause problems such as:
Having gestational diabetes also means you're at an increased risk of developing type 2 diabetes in the future.
- your baby growing larger than usual – this may lead to difficulties during the delivery and increases the likelihood of needing induced labour or a caesarean section
- polyhydramnios – too much amniotic fluid (the fluid that surrounds the baby) in the womb, which can cause premature labour or problems at delivery
- premature birth – giving birth before the 37th week of pregnancy
- pre-eclampsia – a condition that causes high blood pressure during pregnancy and can lead to pregnancy complications if not treated
- your baby developing low blood sugar or yellowing of the skin and eyes (jaundice) after he or she is born, which may require treatment in hospital
- the loss of your baby (stillbirth) – though this is rare
J Fam Pract. 1997 Jun;44(6):556-61.Do low-risk prenatal patients really need a screening glucose challenge test?Helton MR1, Arndt J, Kebede M, King M.
BACKGROUND:It is common practice to routinely screen pregnant women for gestational diabetes. The screening technique typically used is the 1-hour 50-g oral glucose tolerance test (OGTT), with a subsequent 3-hour 100-g OGTT for women whose 1-hour test was positive. This process can be both time-consuming and inconvenient for patients. Additionally, its sensitivity and specificity are estimated to be 70% and 87% respectively, and data about the effect of screening and treatment on low-risk pregnancy outcomes are limited. The objective of this study was to reassess the value of routine screening of all pregnant patients with a 1-hour glucose challenge test.
METHODS:At a university-based family practice center with a predominantly low-risk population, a retrospective analysis was performed of all patients (n = 595) who received prenatal care and gave birth between January 1988 and December 1993. Among women in whom gestational diabetes was diagnosed on the basis of glucose tolerance testing, we identified those with risk factors for the disease, and examined whether a selective screening program based on risk factors alone would have resulted in correct diagnoses of gestational diabetes.
RESULTS:Of the 595 patients, 544 (91.4%) were screened with a 1-hour 50-g OGTT. This initial screening test was positive in 76 women (12.8%). Of these, 58 (76.3%) then had a 3-hour 100-g OGTT, and 13 received a diagnosis of gestational diabetes. Nine of these 13 women had risk factors for gestational diabetes. We determined that less than 1% of prenatal patients without risk factors for gestational diabetes were ultimately found to have gestational diabetes.
CONCLUSIONS:Screening with a 1-hour 50-g OGTT only those women who have identifiable risk factors for gestational diabetes is a reasonable approach to identifying the disease in a low-risk population. All pregnant women should have a thorough history taken to determine whether they have risk factors for gestational diabetes.
PMID: 9191628[PubMed - indexed for MEDLINE]
UPDATE @ 9th Feb 2017 Turns out I was scheduled for a 75gms GTT. Process at Bumrungrad is:
Make sure your Doctor schedules you an early morning test with a follow up appointment on the same day at around midday or later.
1. Fast the night before the test (I fasted for 10/11 hours)
2. Register at the Women's clinic early the next morning
3. Take request form to Lab
4. Have a catheter fitted in one hand
5. Have blood drawn
6. Drink sugary drink in 5 mins
7. Have blood drawn in 1 hour
8. Have blood drawn in 1 hour
9. See doctor (note that results can take 90 mins to come through)
10. EAT!!!!!The drink tastes ok, the lab technicians are normally 'ok' at taking blood (although not the best), you may feel a little dizzy and sick, you will feel very hungry...but all in all it's not too bad!