Shindo R, Aoki S, Nakanishi S, et al. - Researchers conducted this single-centre retrospective study to determine the effect of diagnosing and treating gestational diabetes mellitus (GDM) using the 75-g oral glucose tolerance test (OGTT) performed after 29 weeks of gestation, which is beyond the period recommended by the International Association of Diabetes and Pregnancy Study Group, on delivery and neonatal outcomes. The women in the study had a 50-g glucose challenge test with results < 140 mg/dL at 24–28 weeks of gestation and then a 75-g OGTT after 29 weeks of gestation with abnormal glucose tolerance suspected based on clinical findings. The normal glucose tolerance (NGT) and GDM groups each had 189 and 49 women, respectively. The rates of diabetes-related composite complications among pregnant women diagnosed with GDM during the third trimester were not significantly different from those among pregnant women diagnosed with NGT. The rate of elective caesarean delivery, however, was higher in the group diagnosed with GDM during late pregnancy than in the NGT group. The fact that pregnant women with GDM and suspected LGA foetuses were given the option of elective caesarean delivery may have influenced these findings.