What is the maximum fasting blood glucose level for pregnant women?

Generally, the fasting blood glucose level for pregnant women should not exceed 5.1 mmol/L. The detailed analysis is as follows:

A pregnant woman's fasting blood glucose level reflects her basal insulin secretion and hepatic glucose output. If the fasting blood glucose level is 5.1 mmol/L or higher, it may indicate insufficient insulin secretion or excessive hepatic glucose production, which increases the risk of gestational diabetes mellitus (GDM). GDM is a common complication during pregnancy; if not promptly controlled, it can negatively affect the health of both the mother and the fetus, such as causing fetal macrosomia or intrauterine growth restriction, and preterm birth. It may also increase the mother's risk of developing complications such as hypertension and infections.

In addition, fasting blood glucose levels in pregnant women are an important indicator for diagnosing impaired glucose tolerance and diabetes. If fasting blood glucose exceeds 5.1 mmol/L, it may suggest the presence of impaired glucose tolerance, at which point appropriate interventions should be implemented to prevent the onset of gestational diabetes. By controlling fasting blood glucose levels, these adverse risks can be reduced, ensuring the health of both the mother and the fetus.

Pregnant women should maintain appropriate weight gain and avoid excessive obesity to reduce the risk of insulin resistance.