High risk factors for GDM
Severe obesity
Previous GDM or previous macrosomic baby
Persistent glycosuria
PCOS
Significant family history of type 2 diabetes
Low risk factors for GDM
Maternal age <25
Normal weight before pregnancy
Member of an ethnic group with a low risk of gestational diabetes
No family history of diabetes
No personal history of glucose intolerance
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BMI > 25 kg/m2
Previous history of GDM
Family history of diabetes (1st degree relative)
Previous macrosomic child >9 lb (4 kg)
No physical activity
Hypertension
HDLc < 35 mg/dL (0.90 mmol/L) and/or triglyceride > 250 mg/dL (2.82 mmol/L)
PCOS
HbA1c ≥ 5.7% and previous IGT or IFG
Signs of insulin resistance such as acanthosis nigricans
History of cardiovascular disease
Ethnic backgrounds: African American, Latino, Native American, Asian American, Pacific Islander
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ADIPS [13]
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NICE and SIGN [18,19]
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Moderate risk factors for GDM
BMI 25–35 kg/m2
Ethnic backgrounds: Asian, Indian, aboriginal, Torres Strait Islander, Pacific Islander, Maori, Middle Eastern and non-white African
High risk factors for GDM
BMI > 35 kg/m2
Age ≥ 40 years
Previous history of GDM
Family history of diabetes
History of high blood glucose
History of macrosomic child ≥ 4.5 kg
PCOS
Medication: Corticosteroids, antipsychotics
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BMI > 30 kg/m2
Previous GDM
Family history of diabetes (first-degree family member)
Previous macrosomic baby ≥ 4.5 kg
Ethnic backgrounds South Asian (India, Pakistan or Bangladesh), Black Caribbean, Middle Eastern (Saudi Arabia, United Arab Emirates, Iraq, Jordan, Syria, Oman, Qatar, Kuwait, Lebanon or Egypt)
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CNGOF and SFD [20,21]
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Canadian Diabetes Association [22]
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FIGO [11]
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Age > 35 years
High-risk ethnic origin: South Asian, African, Arab, Hispanic
Corticosteroid medication
BMI > 30 kg/m2
GDM in previous pregnancy
Previous macrosomic baby ≥ 4.0 kg
First-degree family history of diabetes
PCOS or acanthosis nigricans
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Older age, higher parity, ethnicity
Obesity or excessive weight gain during current pregnancy
History of GDM or macrosomia
Family history of diabetes
Previous poor pregnancy outcome
Multiple pregnancy
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