Less than 10% of gestational diabetes mellitus (GDM) cases are type 1 diabetes mellitus (T1DM), and the pre-diabetic stage of T1DM may be missed in women diagnosed with GDM during pregnancy. We present a patient who was diagnosed with GDM at 24 weeks gestation but who was diagnosed with T1DM after presenting with diabetic ketoacidosis in the early postpartum period. In presenting this case, we aim to remind and raise awareness of the risk of developing postpartum T1DM in patients with lean GDM who have no signs of insulin resistance, are aged <30 years, have no family history of type 2 diabetes mellitus, and require insulin therapy
Cite this article as: Sevinç MB, Özbay ÜN, Gül K, Oğuz A. Autoimmune gestational diabetes, an uncommon cause of type 1 diabetes: A case report. Endocrinol Res Pract. 2024;28(3):188-190.