Question
At 24 weeks pregnant, the fasting blood sugar level is 5.1mmol/l, and the blood sugar levels one hour and two hours after meals are 6.6mmol/l and 5.8mmol/l, respectively. Are these values normal?
Answer
The diagnosis of gestational diabetes is conducted between 24 and 28 weeks of pregnancy. This involves measuring blood sugar concentrations at fasting, one hour after, and two hours after a 50-gram oral glucose screening test and a 100-gram oral glucose tolerance test. If at least two of these values exceed the standard levels (fasting blood sugar 5.1mmol/l, one-hour post-meal blood sugar 10.3mmol/l, two-hour post-meal blood sugar 8.1mmol/l, three-hour post-meal blood sugar 6.7mmol/l), gestational diabetes is diagnosed. If only one value is above the normal range, it is diagnosed as impaired glucose tolerance.