Strandberg RB, Iversen MM, Jenum AK, et al. - Researchers conducted this Norwegian national population‐based study to describe the prevalence of gestational diabetes mellitus (GDM) in immigrant women by maternal country- and region of birth compared with Norwegian-born non-immigrants and to explore the connections between the immigrants' length of residence in Norway and GDM. This investigation included 192,892 pregnancies to immigrant women and 1,116,954 pregnancies to non-immigrant women who gave birth between 1990 and 2013. The prevalence and adjusted odds ratio for GDM were substantially higher in immigrant women from Bangladesh, Sri Lanka, Pakistan, India and Morocco compared with non‐immigrants (prevalence 0.8%). Overall, the prevalence of GDM in immigrants increased from 1.3% to 3.3% after 9 years of residence when compared with non-immigrant women. This association was especially strong among South Asian women. The prevalence of GDM varied significantly between countries of maternal birth and was especially high among Asian immigrants. In certain immigrant groups, GDM seemed to increase with a longer length of residence.