The goal of this observational study is to evaluate preoperative measures of abdominal circumference in patients admitted for a cesarean section. The main questions it aims to answer are:

• Can preoperative abdominal circumference predict patients with difficult spinal anesthesia
• Can preoperative abdominal circumference predict the occurrence of maternal hypotension during cesarean section Participants will be examined preoperatively in terms of visibility and palpation of spinous processes, abdominal circumference will be measured in the supine and sitting positions with other clinical parameters. Spinal anesthesia will be performed by the same experienced anesthesiologist with a standardized procedure. The number of skin punctures, needle reorientations, traumatic Cerebrospinal fluid, need for a paramedian approach or failure will be recorded. Maternal blood pressure and vasopressor requirements will also be monitored.

Inclusion Criteria:

• Parturients admitted for elective or emergency cesarean section

Exclusion Criteria:

• Acute fetal distress
• Umbilical cord prolapse
• Scoliosis
• Contraindication to spinal anesthesia
• Medical history of spinal surgery American Society of Anesthesia Status 4 or 5

Female pregnant patients

Parturients scheduled for elective cesarean section or admitted for emergency cesarean section in the maternal operating theater of Mohammed VI University Hospital during the period of the study

All data collected throughout the trial will be shared

Beginning 3 months and ending 1 year after the publication of results