Some providers keep it chilled or let you pour it over ice and drink it cold. A blood draw: An hour later, a blood sample is taken to check your blood sugar level. The result indicates how efficiently your body processes sugar. Results: These should be available in a few days.
If the reading is too high, which happens an estimated 15 to 23 percent of the time, you'll be asked to return for a three-hour glucose tolerance test see below to see whether you have gestational diabetes. The good news is that most women whose screening test shows elevated blood sugar don't turn out to have gestational diabetes. Here's what to expect at the lab: First blood draw: When you arrive for the test, a blood sample is taken to measure your fasting blood glucose level.
An even sweeter drink: Next, you'll drink either a more concentrated dose or a larger volume of glucose solution. Three more blood draws: Brace yourself for three more arm pricks, as your blood is tested every hour for the next three hours.
The lab tech should alternate arms each time your blood is drawn. Some tips to make your test more comfortable: Have someone drive you to and from the test in case you feel lightheaded or are low on energy due to fasting.
Bring something to distract you, because you have to stay nearby when your blood is not being drawn. Bring something to eat right after the final blood sample is taken, because you'll probably be starving. Sweet drink: Next, you'll drink a very sweet drink, which usually contains 75 grams of glucose. Two more blood draws: Your blood will be drawn at one hour and two hours after the drink. Results: If any of your blood sugar readings are abnormal you will be diagnosed with gestational diabetes.
As with any blood draw, there is a slight risk of: Feeling lightheaded or fainting Excessive bleeding Infection at the blood draw site, or buildup of blood under the skin Is there anything I can do to help me pass the glucose tests? These are: Healthy eating : Opt for whole grains, fruits, and vegetables, which are high in fiber, and cut back on foods and drinks that are high in added sugars. Exercise: Moderate exercise , such as walking briskly and swimming, can help keep your blood sugar under control.
Maintaining a healthy weight: Use our pregnancy healthy weight gain calculator to estimate how much you can expect to gain and whether you are on target. Together you'll come up with a treatment plan, which will cover: Strategies for managing gestational diabetes Diet for gestational diabetes Medication for gestational diabetes Your high blood sugar should last only as long as your pregnancy. Learn more Folic acid may reduce gestational diabetes risk How will gestational diabetes affect my baby?
Tips from moms-to-be with gestational diabetes Will gestational diabetes affect my birth options? Sources BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. Claudia Boyd-Barrett. Featured video. Preterm labor and birth. Chorionic villus sampling CVS. Rh factor testing. Quad screen second-trimester prenatal screening.
What to expect from your third trimester prenatal appointment. Risk factors may include:. If your doctor determines you're at risk or you have a suspicious value on the one-hour test, you may be advised to take a three-hour glucose tolerance test.
After drinking the glucose solution, you'll likely need to remain in the doctor's office or lab while you're waiting for your blood glucose level to be tested.
If the results of your glucose tolerance test indicate type 2 diabetes, your doctor may repeat the test on another day or use another blood test to confirm the diagnosis. Various factors can affect the accuracy of the glucose tolerance test, including illness, activity level and certain medications.
If you're being tested for gestational diabetes, your doctor will consider the results of each blood glucose test. If one of the results is higher than normal, you'll likely need to test again in four weeks. If two or more of the results are higher than normal, you'll be diagnosed with gestational diabetes. If you're diagnosed with gestational diabetes, you can prevent complications by carefully managing your blood glucose level throughout the rest of your pregnancy.
Explore Mayo Clinic studies of tests and procedures to help prevent, detect, treat or manage conditions. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. Will my induction be different if I have gestational diabetes? Our midwife explains whether induction of labour is any different if you have gestational diabetes. More labour complication videos. Smoking affects the oral glucose tolerance test profile and the relationship between glucose and HbA1c in gestational diabetes mellitus.
Diabet Med 33 9 Caughey AB. Gestational diabetes mellitus: obstetric issues and management. Everyday life with gestational diabetes. Different strategies for diagnosing gestational diabetes to improve maternal and infant health.
Stress exposure and psychological stress responses are related to glucose concentrations during pregnancy. The effect of smoking on the risk of gestational diabetes mellitus and the OGTT profile during pregnancy. Diabetes Res Clin Pract Lab Tests Online. Glucose tests. Gestational diabetes.
Diabetes in pregnancy: management from preconception to the postnatal period. Last updated December Diabetes in pregnancy. The Glucose tolerance test GTT measures how quickly a dose of glucose is cleared from the blood. It is performed in the majority of our Collection Centres. Where possible, an appointment should be made at a collection centre with an internal toilet as you are required to remain in the centre for minimum of 2 hours. You may wish to bring a book or magazine to read while you are waiting.
Before taking this test, you MUST fast i.
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