Prevalence of diabetes five years after having gestational diabetes during pregnancy - Croatian national study.

•Prevalence of diabetes 5 years after pregnancy with gestational diabetes in Croatia is 3.75%.•Medical birth certificates and CroDiab are good and reliable national registries.•Women who develop diabetes after gestational diabetes in pregnancy have higher BMI.•Follow up of women with gestational diabetes in pregnancy should continue after childbirth in primary care settings.