Gestational diabetes symptoms

Written by Tang Zhuo
Endocrinology
Updated on May 13, 2025
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Gestational diabetes refers to the onset or first-time detection of varying degrees of hyperglycemia during pregnancy, including pre-pregnancy unrecognized glucose intolerance and diabetes. Typical clinical symptoms of gestational diabetes include polyuria, polydipsia, polyphagia, or recurrent vulvovaginal candidiasis. If the pregnant woman's weight is greater than or equal to 90 kilograms, and the current pregnancy is complicated by excessive amniotic fluid or macrosomia, there is also a high suspicion of gestational diabetes. In severe cases or those with poor blood sugar control, not only is there an increased risk of preterm labor but also miscarriage, and in severe cases, ketoacidosis may occur.

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Exercise for Gestational Diabetes

Exercise can increase insulin sensitivity and can lower blood sugar independently of insulin. Therefore, patients with gestational diabetes can also exercise appropriately, which is beneficial for the utilization of blood sugar and helps lower it. The exercise for gestational diabetes generally involves regular, rhythmic aerobic exercises, which can include upper body exercises, gymnastics, and previously mentioned activities. The duration of exercise should generally be around 20-30 minutes, and it is advisable to exercise about one hour after meals. The frequency of exercise should be three to five times per week. During exercise, the heart rate should not exceed 120 beats per minute to avoid intense physical activity.

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Gestational diabetes blood sugar standards

The diagnostic criteria for gestational diabetes involve a pregnant woman undergoing a 75-gram glucose test at any time during pregnancy to measure fasting blood glucose, blood glucose one hour after consuming glucose, and blood glucose two hours after consuming glucose. The thresholds are: fasting blood glucose equal to or greater than 5.1 mmol/L, blood glucose one hour after glucose intake equal to or greater than 10.0 mmol/L, and blood glucose two hours after glucose intake equal to or greater than 8.5 mmol/L. Diagnosis of gestational diabetes can be made if blood glucose levels exceed these standards at any of the three time points. In China, pregnant women typically undergo the 75-gram glucose test between the 24th to 28th week of pregnancy. Women at high risk for gestational diabetes are advised to undergo the 75-gram glucose test early.

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How to treat gestational diabetes?

The treatment principle for gestational diabetes is to control blood sugar and then ensure the normal development of the child. There are many methods to control blood sugar. First, it involves diet management guided by a doctor, adjusting the diet's structure and quantity, followed by post-meal exercise. If after a week of adjusted diet and post-meal exercise, blood sugar levels still do not meet the standards, insulin injections can be used to keep the pregnant woman's blood sugar within the prescribed range. This can help reduce the impact of diabetes on the fetus and the pregnant woman.

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High-risk factors for gestational diabetes

High-risk factors for gestational diabetes include: women older than 35 years, those with a history of gestational diabetes, history of delivering large babies, obesity, patients with polycystic ovary syndrome, first-degree relatives with a family history of diabetes, early pregnancy checks showing fasting hyperglycemia or positive glucosuria, patients who have had multiple spontaneous miscarriages without obvious causes, fetal malformations, stillbirths, and patients with a history of delivering newborns with respiratory distress syndrome. Women with the above high-risk factors should undergo early testing for fasting blood glucose and a 75-gram glucose tolerance test to diagnose gestational diabetes and initiate early intervention.

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Written by Tang Zhuo
Endocrinology
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Gestational diabetes manifestations

Gestational diabetes refers to hyperglycemia that either develops or is first identified during pregnancy, including previously unrecognized glucose intolerance and diabetes prior to pregnancy. Typical symptoms of gestational diabetes include frequent urination, increased thirst, and increased hunger, or recurrent vulvovaginal candidiasis. High vigilance for gestational diabetes is warranted if the pregnant woman weighs over 90 kilograms, or if the current pregnancy is complicated by excessive amniotic fluid or a macrosomic fetus. The danger of this condition is that, in severe cases or where blood sugar control is poor, it can easily lead to miscarriage and preterm birth, as well as infections, and in severe cases, may lead to ketoacidosis. Treatment involves two aspects: one is dietary control, and for patients who cannot control their diet effectively, insulin treatment can be used. (Medication should be used under the guidance of a doctor.)