Gestational diabetes is high blood sugar (diabetes) that starts or is first diagnosed during pregnancy.
Glucose intolerance during pregnancy
Pregnancy hormones can block insulin from doing its job. When this happens, glucose level may increase in a pregnant woman's blood.
You are at greater risk for gestational diabetes if you:
- Are older than 25 when you are pregnant
- Come from a higher risk ethnic group, such as Hispanic American, African American, Native American, Southeast Asian, or Pacific Islander
- Have a family history of diabetes
- Gave birth to a baby that weighed more than 9 pounds (4 kg) or had a birth defect
- Have high blood pressure
- Have too much amniotic fluid
- Have had an unexplained miscarriage or stillbirth
- Were overweight before your pregnancy
- Gain too much weight during your pregnancy
- Have polycystic ovarian syndrome