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Women of reproductive age with type 1 diabetes mellitus (DM) and chronic kidney disease stage 5 after successful combined pancreas-kidney transplantation (CPKT) can experience spontaneous pregnancies with a favorable outcome. However, those pregnancies are associated with a high risk of complications: arterial hypertension, preeclampsia, premature birth, progression of diabetic retinopathy. During pregnancy, both gestational diabetes and spontaneous hypoglycemia can develop. This article presents a description of the clinical case of a 42-year-old patient with DM type 1, in whom pregnancy occurred 2 years after successful CPKT. Blood pressure was normal, the fundus condition was stable after previous treatment. The patient received tacrolimus and minimal dose of corticosteroids, at 13 weeks acetylsalicylic acid was prescribed to prevent preeclampsia. At 30 weeks nocturnal episodes of hypoglycemia appeared that were treated by additional intake of carbohydrates with an average glycemic index in combination with animal fats and proteins. At 36 gestational weeks caesarean section was performed due to premature rupture of membranes. A healthy girl was born with weight of 2140 g, height of 48 cm, Apgar score 7/8 points. The mother’s function of the kidney and pancreas grafts remained normal. Preconceptional counseling and multidisciplinary pregnancy management are important for patients after CPKT.

Due to its effect on insulin resistance, ease of administration and favorable safety profile, metformin has been included in the recommendations of foreign medical communities for the management of pregnant women with hyperglycemia since 2008. However, in Russia, the use of any oral hypoglycemic agents during pregnancy is still contraindicated. However, recent studies demonstrate the safety and positive effects of metformin on pregnancy in patients with pregestational diabetes mellitus, polycystic ovary syndrome and gestational diabetes mellitus. In 2023, the Federal Service for Surveillance in Healthcare of the Ministry of Health of Russia updated the instructions for the medical use of Glucophage® and Glucophage®Long: pregnancy was excluded from the “Contraindications” section and moved to the “With caution” section. This resolution is intended to evaluate studies of the effectiveness and safety of metformin, as well as to study the experience of foreign colleagues and Russian legal aspects of prescribing metformin in the stages of preparation for pregnancy, during it and in the post-gravid period.