Inclusion Criteria:  Pregnant women over the age of 18, with ASA (American Society of Anesthesiologists physical status) ≤ III, body weight 50-100 kg and height 150-180 cm, with a single pregnancy planned for cesarean section under elective conditions under spinal anesthesia, will be included in the study.  Exclusion Criteria:  Pregnant women with allergy or hypersensitivity to norepinephrine, pre-existing hypertension or pregnancy-induced hypertension, cardiovascular or cerebrovascular disease, renal failure, history of thrombosis in the mesenteric or peripheral vessels, history of diabetes with known fetal anomalies, users of monoaminooxidase inhibitors, tricyclic antidepressants and those who refused to study were excluded.  -