Hemoglobin A1c in early pregnancy to identify preexisting diabetes mellitus and women at risk of hyperglycemic pregnancy complicationsAJOG Global Reports at a Glance by Ka Wang Cheung, MD, Tiffany Sin-Tung Au, BSc, Chi-Ho Lee, MD, Vivian Wai Yan Ng, MBBS, Felix Chi-Kin Wong, MBBS, Wing-Sun Chow, MBBS, Pui Wah Hui, MD, Mimi Tin Yan Seto, MBBS

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