Function tests

In accordance with the pregnancy guidelines, every pregnant woman in the 6^th to 7^th month of pregnancy (24 + 0 until 27 + 6 weeks of pregnancy) is offered to be tested for gestational diabetes.

Pre-test in all pregnant women from the 24 + 0 until 27 + 6 weeks of pregnancy with 50 g OGTT:

• 50 g glucose solution is drunk
• Pregnant woman is not to be fasting (no 0 min blood glucose value necessary)
• Can be performed at any time of day
• Collection of a venous blood sample (correctly filled S-Monovette® GlucoEXACT) after 60 min
• Evaluation of glucose concentration in the venous plasma either in the laboratory or by immediate testing with an appropriate blood sugar measuring device

In case of blood glucose values of ≥ 135 mg/dl – 199 mg/dl after 60 min, there is a suspicion of gestational diabetes, hence a 75 g OGTT should be added.

In case of blood glucose values of ≥ 200 mg/dl, diagnosis is not gestational diabetes but rather “initial manifestation of diabetes mellitus in pregnancy” (without performing a 75 g OGTT).

Pre-test in all pregnant women from the 24 + 0 until 27 + 6 weeks of pregnancy with 75 g OGTT:

• 75 g glucose solution is drunk
• Pregnant woman must be empty-stomached with a fasting period of at least 8 hours
• Collection of venous blood (correctly filled S-Monovette® GlucoEXACT) before (0 min value) and then 1 hour and 2 hours after glucose administration
• Evaluation of glucose concentration in the venous plasma either in the laboratory or by immediate testing with an appropriate blood sugar measuring device

75 g OGTT:

A diagnosis of “gestational diabetes” is made, when one of the following blood glucose values is met:

• Fasting: ≥ 92 mg/dl 
• After 1 hour: ≥ 180 mg/dl)
• After 2 hours: ≥ 153 mg/dl – 200 mg/dl

The diagnosis of gestational diabetes is already given, when only one value is exceeded.

A diagnosis of “initial manifestation of diabetes mellitus in pregnancy” is made, when the following levels are met:

• Fasting: ≥ 126 mg/dl
• After 2 hours: ≥ 200 mg/dl