Background: Spinal anesthesia is the method of choice for the cesarean section. Hypotension is a common complication of this method. Hypotension is the most common complication of spinal anesthesia that occurs with a 30-60% incidence . Fentanyl has a rapid onset and a shorter duration of action following intrathecal administration but its duration of action may be dose dependent. Aim and Objective: To study the compare of the sensory block parameters during and after caesarean delivery Methodology: The present study was conducted in the Department of Anesthesiology, Santosh Medical College and Hospital, after approval of the Institutional Research Committee. The present study was conducted between August 2016 to July 2017. Patients undergoing elective caesarean section delivery surgery, under spinal anaesthesia during the study period. A sample size of 90 patients were randomly allocated in three groups of 30 each. Result: The mean time for the commencement of sensory perception was 1.57 seconds for group BF2 and 1.8 seconds for group B, respectively. All three groups' values were comparable. Group B had the highest mean time for the highest level of block (8.031±27), while group BF2 had the lowest mean time (7.530±68). Conclusion: Cesarean sections under spinal anesthesia in the lateral position than in the sitting position lead to a more rapid sensory and motor block, reduced ephedrine consumption, and enhanced satisfaction of women.