INS and gestational diabetes: The two groups were similar in age, parity, previous GDM, ethnicity (although numerically there was a higher proportion of European women in the NGT group and a higher proportion on non-European women in the IGM group), heredity (first-degree relative), gestational weight gain, fasting and OGTT 2-h glucose at GDM diagnosis, proportion of women with early GDM diagnosis, and proportion of women treated with insulin.