Furthermore, 105 966 fetuses (16.3%) were exposed in utero to maternal diabetes, 4000 (0.62%) to insulin-treated pregestational diabetes (3880 with insulin purchase also during pregnancy), 3724 (0.57%) to type 2 diabetes not treated with insulin (3349 [90%] had an ICD-10 code O24.1 or E11 diagnosis), and 98 242 (15.18%) to gestational diabetes not treated with insulin. This evidence concerns the gene INS and type 2 diabetes mellitus.