Gestational diabetes risk factors
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Key Risk Factors for Gestational Diabetes Mellitus (GDM)
Gestational diabetes mellitus (GDM) is a common pregnancy complication with several well-established risk factors. The most consistently supported risk factors include increased body mass index (BMI), hypothyroidism, advanced maternal age, family history of diabetes, and certain metabolic and genetic factors 1256+4 MORE.
Obesity and High BMI
Obesity and higher BMI before or during pregnancy are among the strongest and most consistent risk factors for GDM. Women who are overweight or obese have a significantly higher risk of developing GDM compared to those with normal BMI. The risk increases further with higher BMI categories, especially for those with BMI over 30 or 35 kg/m² 1267+2 MORE.
Advanced Maternal Age
Older maternal age is another important risk factor. The likelihood of developing GDM increases as women get older, particularly for those over 35 years of age 26910.
Family History and Ethnicity
A family history of diabetes, especially in first-degree relatives, raises the risk of GDM. Additionally, non-white ethnicity has been associated with a higher risk of developing GDM 69.
Metabolic and Physiological Factors
Several metabolic factors contribute to GDM risk. These include:
- Elevated fasting plasma glucose (FPG) and HbA1c levels in early pregnancy
- Presence of metabolic syndrome (MetS) or its components, such as increased waist circumference, high blood pressure, and abnormal lipid levels
- Pre-existing hypertension and polycystic ovary syndrome (PCOS) 7910.
Hypothyroidism
Women with hypothyroidism are at increased risk for GDM, and early screening is recommended for those with known thyroid disease .
Lifestyle and Pregnancy-Related Factors
A sedentary lifestyle, poor diet, and lack of physical activity are modifiable risk factors that can increase the likelihood of GDM. Other pregnancy-related factors include:
- Use of insulin during pregnancy
- Multiparity (having had multiple pregnancies)
- Early diagnosis of GDM in pregnancy
- Macrosomia (having a large baby in a previous pregnancy)
- Hypertensive disorders during pregnancy 2456.
Genetic and Epigenetic Factors
Genetic predisposition plays a significant role in GDM risk. Specific genetic and epigenetic changes can increase susceptibility, and gene–lifestyle interactions may further influence risk 810.
Conclusion
The most significant risk factors for gestational diabetes include high BMI, advanced maternal age, family history of diabetes, certain metabolic and physiological conditions, hypothyroidism, and genetic predisposition. Many of these factors are modifiable, highlighting the importance of lifestyle interventions and early screening, especially for women with known risk factors. Understanding and addressing these risks can help reduce the incidence and complications of GDM for both mothers and their children 1256+4 MORE.
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