Screening tests for gestational diabetes in Japan in the 1st and 2nd trimester of pregnancy

International Association of Diabetes and Pregnancy Study Groups Recommendations on the Diagnosis and Classification of Hyperglycemia in Pregnancy

“…Need for rapid treatment and close follow-up during pregnancy to ensure prompt restoration of normal glycemia (53,54). …”

The Increasing Prevalence of Diabetes in Pregnancy

“…In a study conducted in 6 urban districts in Tianjin, China, using 1999 WHO diagnostic criteria and universal screening, the prevalence was 2.3% (84). Finally, in a study conducted in Japan, using the Japanese Society of Obstetrics and Gynecology (JSOG) criteria for GDM and universal screening, the prevalence was 2.9% (85).…”

Screening for gestational diabetes at antenatal booking in a Malaysian university hospital: The role of risk factors and threshold value for the 50‐g glucose challenge test

“…1 A recent multicentre intervention trial on women with moderate GDM indicated benefit from intervention started at 24-34 weeks gestation. 2 In a Japanese population at low risk of GDM (with a 2.9% GDM prevalence rate), 63.6% of GDM can be diagnosed as early as the first trimester, 12 and in a Thai population, more than half of GDM can be diagnosed before 20 weeks gestation. 13 Current evidence is unclear as to what is the best reference diagnostic test for GDM.…”