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(a) Cumulative bar chart of the participants' gestational weight gain (GWG) stratified by pre‐pregnancy body mass index (BMI) in the Japanese Ministry of Health, Labor and Welfare (MHLW) classification. (b) Cumulative bar chart of the participants' GWGs stratified by pre‐pregnancy BMI in the Institute of Medicine (IOM) classification. GDM, gestational diabetes mellitus.
