Objective. To increase the effciency of spinal anesthesia (SA) in operative delivery of pregnant women with type 1 diabetes mellitus (DM).Materials and methods. A dynamic assessment of the clinical effciency of spinal anesthesia in cesarean sections was performed in 123 pregnant women with DM. The level of the sensor and motor block was determined depending on the dose of a 0.5% hyperbaric solution of bupivacaine calculated according to the original method.Results. The SA method in cesarean sections in pregnant women with diabetes mellitus has been proposed taking into account the dosage of a hyperbaric solution of bupivacaine depending on the patient`s height and gestational age. The application of this method provided the development of the necessary degree of the sensory and motor block by the eight minute and created the requisite conditions for a cesarean section.Conclusion. The proposed method of the calculation of the hyperbaric solution dosage for subarachnoid anesthesia taking into account the patients` height and gestational age makes it possible to ensure the necessary degree of the sensor block at the level of 4-5 thoracic segments and suffcient relaxation in the surgical area during a cesarean section.