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Keywords: Type 1 diabetes; Pregnancy; aHCL; CGM metrics EN Type 1 diabetes Pregnancy aHCL CGM metrics 516 518 3 07/07/23 20230701 NES 230701 To the Editor: The achievement of strict glycemic control during pregnancy in women with type 1 diabetes (T1D) is essential to prevent pregnancy-related complications (such as congenital malformation, pre-eclampsia, and preterm delivery) and to reduce the risk of delivering infants large for gestational age (LGA).[1] Although continuous glucose monitoring (CGM) can help reaching targeted glucose levels,[2] only a minority of pregnant women achieved the glycemic and HbA SB 1c sb targets recommended by international guidelines.[3] In recent years, the introduction of closed-loop insulin delivery systems has allowed a significant improvement in glycemic control in subjects with TID. The use of the aHCL system may improve CGM metrics in pregnant women with long-lasting T1D unwilling to stop aHCL therapy during pregnancy or with an unsatisfactory glycemic control with other insulin therapies. [Extracted from the article]