Pregnant women between the 24th and 28th weeks of gestation, after 10–16 h of fasting, gave blood, and the fasting glucose levels were tested. They ingested 300 ml of Accu-Chek Dextrose O.G.-T. (Roche), which contains 75 g of glucose, and gave blood after 60 and 120 min, according to manufacturer’s instructions. Glucose was measured in the certified laboratory of the University Hospital Basel.