Inclusion Criteria:  Patient will receive an elective c-section under spinal anesthesia Gestational age > 37 weeks  Exclusion Criteria:  ASA score ≥ 3 Allergy or contraindication to receiving opioids (morphine or fentanyl) Allergy or contraindication to receiving anti-inflammatory drugs (ketorolac, Naprosyn) Allergy or contraindication to receiving acetaminophen Height <152 cm or> 183 cm Weight <50 or> 110 kg Contraindication to spinal anesthesia Conversion to general anesthesia Combined spinal-epidural anesthesia Inability to give informed consent, either secondary to a mental or physical disability or a significant language barrier (Inability to understand English or French) Need for transfusion or other major complication