Carbohydrate intolerance of variable severity with onset or first recognition during pregnancy.
Gestational diabetes occurs in 10–15% of all pregnancies. Although it typically resolves after delivery, as many as 50% of women with this disorder eventually develop impaired glucose tolerance or diabetes mellitus (DM). Factors that increase the likelihood of gestational diabetes include obesity, maternal age over 25, family history of DM, and prior history of gestational diabetes. DM occurring during pregnancy increases the risk of maternal pyelonephritis and of certain congenital anomalies, and is often associated with polyhydramnios and fetal macrosomia, with resultant dystocia. The infant of a woman with gestational diabetes is more likely to develop obesity, impaired glucose tolerance, or DM. It is recommended that pregnant women at risk be screened for gestational diabetes between the 24th and 28th week of pregnancy. Gestational diabetes can usually be managed by restriction of carbohydrate intake, but insulin is sometimes required.
Reference: Stedman's Medical Dictionary