Diabetes in pregnancy.

Women with diabetes in pregnancy can be divided into two groups: women with diabetes diagnosed before pregnancy (pregestational diabetes) and women with glucose intolerance diagnosed during pregnancy (gestational diabetes mellitus). The majority of women with pregestational diabetes have insulin-dependent diabetes mellitus (IDDM), but may also include early-onset non-insulin dependent diabetes mellitus (NIDDM). Gestational diabetes mellitus (GDM) can represent first recognition of IDDM or NIDDM. The expression of each of the forms of diabetes as a clinical disorder represents a complex interaction of genetic and environmental factors. The prevalence of GDM varies between 0.15 and 4% and the prevalence of pre-GDM 0.2-0.4% in European countries [1].