Project title: "Effectiveness of noradrenaline vs etilefrine in maternal hypotension after spinal anesthesia in anterior cesarean section in the Regional Hospital of Loreto 2024". General objective: To compare the effectiveness of noradrenaline versus etilefrine in the treatment of maternal hypotension after spinal anesthesia in patients undergoing anterior cesarean section at the Regional Hospital of Loreto 2024. Methodology: analytical, longitudinal, observational prospective cohort study. Research design: Prospective cohort study where variables are manipulated, where the dependent variable is the effectiveness, the return of MAP after hypotension caused by the placement of spinal anesthesia for cesarean section, and the independent variable, will depend on the vasopressor used, according to the recommendations of current protocols. Population and sample: Pregnant women who underwent ...