It is possible to develop gestational diabetes with or without the risk factors listed below. However, the more risk factors you have, the greater your likelihood of developing gestational diabetes. If you have a number of risk factors, ask your doctor what you can do to reduce your risk.

Risk factors for gestational diabetes include:

Studies found that women with a body mass index (BMI) of 25.0 to 29.9 (classified as overweight) are at an increased risk of gestational diabetes. If your BMI is over 30, you are at an even greater risk.

If you had gestational diabetes with a previous pregnancy, this puts you at risk for developing the condition again.

Being older (eg, 35 years or older) may increase your risk of gestational diabetes.

If you have a first-degree relative (parents, siblings) with diabetes, your risk of gestational diabetes is increased.

You may be at an increased risk of developing gestational diabetes if you are:

  • Hispanic American
  • Native American
  • Asian American
  • African American
  • Pacific Islander

If you delivered a baby who was abnormally large at birth (called macrosomia), this increases your chance of gestational diabetes in your next pregnancy.

  • Having a history of glucose intolerance
  • Having a history of polycystic ovary disease
  • Being pregnant with more than one fetus (multiple gestation)
  • Gaining weight rapidly during pregnancy
  • Having risk factors related to childbirth (eg, having a previous stillbirth, having a child with a birth defect, having too much amniotic fluid surrounding baby during pregnancy)